Yogata Velo Matzasah Al Tamin!
Don’t be naive and make it sound like Chicago is some little hicktown. Look around the city, there are more options for kollel families, rebbeim, large families, and mashgichim to make weddings. You can make a huge wedding for a fraction of your quoted amount.
Do the requisite research in to ALL halls in Chicago and you will find these metzias. Put in the yegiah and you will find! Yagata umatzasah tamin!