You’re doing great so far! I’ve been involved in the wedding industry for the past 10+ years. Here’s my recommendations:
Linens: www.tableclothfactory.com
Much less expensive to buy new versus renting. Their polyester linens are the same quality you would be renting. You’ll need to google the dimensions you need so you can order the right sizes. Also check Craigslist or Facebook market place for people reselling.
Beautiful disposable tableware and cutlery:
www.smartyhadaparty.com
Instead of disposable stemware, Dollar Tree sells plain wine glasses. They can be ordered by the case online. They’ll need to be washed and the stickers taken off, but at $1 each. It’s worth the effort over disposal stemware. I’ve never seen any disposable stemware that looks nice.
As far as catering goes, that’s so dependent on location I don’t know if I have a good recommendation for that. Check with local restaurants. If they won’t deliver or set up, you can buy disposable chaffer stands and Sternos at Sam’s Club or a party supply store. But food served buffet style will be cheaper than a served meal. Far cheaper.
Alcohol: serve iced down in containers. When it’s gone, it’s gone.
The potty situation is ridiculous at this venue. But what’s done is done. Just get as many quotes as you can. Call around in the city also. Some companies won’t have a problem delivering 50 miles away.
I hope some of this is helpful.