Budget ri or ct venues

Hello everyone! Just recently got engaged. Really hoping to be able to fit 150-160 in my fiancé’s parents backyard. It’s right on the water, so gorgeous and absolutely perfect for us. But, it may not be possible and is depending on tent/staging because there is a slight incline on one side of the yard.
With that being said, does anyone have insight on some budget friendly venues or land/yards that people rent? We have a super laid back style and don’t mind doing leg work if the venue doesn’t have catering, tables, chairs etc. hoping for a rustic or beachy vibe if possible but not necessary. Trying to keep budget between 10-15k so we can do an outrageously awesome honeymoon! Thanks in advance for your help!