Re: used pontoon boat/party boat
I assume you are still in the looking stage.
Prior to our current boat, I had always been around fiberglass vee-hull boats, from a 23-ft cuddy to a 30-ft dual cabin.
Moving to our current lake, we bought a pontoon - 22-ft, high-perfromance tri toon with a 150 hp Yamaha. We can easily pull both tubers and skiers and the boat tend to top out at high 30s (without pulling anyone).
I think there is something you need to understand about pontoon boats. Basically, there are three types of pontoons - a "standard" tow pontoon boat which will be pretty limited in maneuverability; a tri-toon which has a center pontoon that is the same size as the outer two, this tends to increase the HP of motor it can carry but one improves manueverability a little; and a high-performance tri-toon that has a larger, wider center pontoon and maneuvers almost as well as a deck boat. There are only a few manufacturers that make the high performance kind - Premier, Manitou, and Bennington and possible one or two others.
I think in your price range, you will be limited to either a standard pontoon or a tri-toon.
The advantages of a toon = lots more room for people and a bit less maintenance. Advantages of deck boat = more maneuverable.