This is one of the companies I work for. Can I get some professional input from people. I actually own the patent on this product and designed and engineered most of it myself. Just let me know your thoughts on the product. They sell for anywhere between $30,000 and $50,000 depending on the available options you choose.
This is a paradise party island New.paradisepartyisland.com . It is a 30'X25' barge-like boat with anything you could possibly need out on the water. No motor so coast guard and DNR can't ask you how much you've had to drink, but it will pull with a jet ski. It only drafts 10"-12" of water so it can be dropped at any lake's public access. It can hold up to 40,000lbs of distributed weight but with good elbow room you could put 45 or so people on it. It also has a water slide, diving board, bball hoop, bathroom, and many other things that aren't shown.
Everything attaches with no tools, just slide it into a deck mount hole. 1 person can set this up in about 15-20 minutes.
Everything stores down in the 750cuft hull through the 6'x8' hatches located at both ends and folds down to prepare for trailering.
Hydraulic cylinders raise the wings with the push of a button after you've packed everything away and in 45 sec. you're ready to go down the road, under 13' tall and 101" wide, which is legal to drive without permits by US DOT and will clear almost any bridge you might come by.