Is religion important to you? Have an intimate church wedding (immediate family & friends, 25 or less) with no attendants but a dress & bouquet for you and afternoon reception in their social hall with snacks, non-alcoholic drinks and cake from the grocery store (some can do tiered cakes). Include beer, wine &/or champagne if desired & allowed.
My daughter had a destination wedding in Las Vegas in a park (Red Rock Canyon, though wanted Valley of Fire). No flowers, attendants, hoopla, just close family and friends standing around in the scenery. Good friend got certified online to be the officiant. Photographer was a gift from her brother. Everyone had a fun weekend of organized activities at their own expense: hikes, casino hopping, buffets, Top Golf, dancing waters, New Year’s Eve pizza party (paid for by parents & godparents) in their hotel suite & fireworks watching.
Then they had a picnic in a seaside park later in the year midway between the families with no agenda, just catered BBQ & an ice cream truck, corn hole & games. Everyone could drive there & back in a day or stay at their own expense. Didn’t break the bank & the couple got to have a long weekend vacay in Vegas & the Delaware shore without the introvert groom having to be the center of attention.
Clever touch: kraft paper-covered picnic tables had conversation-starter questions (favorite pet? What’s the most fun place you’ve been to? etc.), tic-tax-toe, word puzzles.
Friends got married at a courthouse, later had a big affair at a fire hall in the spring. She’s good with crafts, so did a lot herself:(mini jars of homemade apple butter as gifts, chalkboards with sayings, table assignments, directions; cut up sausage, cheese, pickles, pretzels, mustard & crackers as appetizers, big pans of mac n cheese, green beans, fried chicken & ham plus salad for dinner buffet. Wine bottles on tables for self serve (or maybe a bartender?). They paid for the hall, a cupcake tower w a small cake on top for them to cut, paper/plastic ware, the fun band, and people to set up & tear down.
You can find beautiful wedding gowns at thrift stores or secondhand online. I wore my mom’s dress for my first wedding & got a perfect dress on sale at David’s Bridal for $99 for my second.
You could invite everyone for a big pot luck with BYOB at a local venue & surprise them with a ceremony, wedding cake & Champagne (or Asti or Prosecco) toast. Get your bouquet from the grocery store & wrap with ribbon or florist tape.
Get paper plates, plastic ware, cups & napkins from the Party Store (or online) in your colors. Have balloons for table decorations & use white plastic tablecloths in your color, or if the venue provides table cloths get tissue paper in your colors to put on top of the tables for color. Metallics give it a pop. Then have your honeymoon trip. Buy wine & beer in bulk if you want booze. Oriental Trading Co. has a bridal catalog for inexpensive reception ideas.
For a lunch reception I made tuna salad, chicken salad, 3-bean salad, pasta salad w no mayo & fruit salad (or make melon balls, or a platter of grapes & strawberries) & got bags of green salad. Add breads, chips, salad dressing, drinks & cake & you’ve got a lovely luncheon for less with no catering expense. You can also get 6-foot sandwiches, cut them up & arrange them on plates fairly inexpensively if you don’t like to cook.
A catered brunch is cheaper than lunch or dinner. You can get OJ, breads & pastries, butter, jam & tea bags at the grocery store, then hire someone to make omelets, have a chafing dish of hash browns & get the venue to supply coffee & hot water in urns. If you want, have a toaster or two set up with a plate of toaster waffles &/or pancakes with a pitcher of syrup. Add pitchers of mimosas & bloody Mary’s if you want booze.
I put thick ribbon on baskets & lined them with colored tissue paper for the plates, napkins & utensils, put grocery store flowers in a vase wrapped in ribbon or tulle to decorate the food table in the chosen colors, or you could use the balloons & anchors as table decor.
Since I had a Sunday reception, friends & I had to get a party tank of helium & blow up the balloons, attach lengths of ribbon & tie them to the anchors in the morning before the event as stores with helium balloons were closed Sun. am. But grocery store florist departments could have you covered.
Or get pretty votive holders & tea lights (regular or battery) for cheap but pretty table decor. Just make sure you have someone to light them before people arrive.
Have a musical friend make a playlist, or hire a local DJ (maybe you have someone in the family who would play what you want) and you have a party!
If you want bridesmaids, have them pick their own dresses in a specific color or color range. Each can carry a single rose or other flower, then put them in a vase on the wedding party table at the reception.
People remember the fun, and how happy people are, not the expense or how fancy the food/decor was.
You could also have family suggest to guests who inquire that your preferred gifts would be $$ towards a honeymoon trip vs. stuff.
If your fiancé is shy, create an experiences where he is not the center of attention long & is surrounded by people he is comfortable with for the rest (no receiving line, a circular wedding party table so he’s not facing a room of people, just the friends across the table, short ceremony, no first dances, seated for any toasts).