My brother had the slightly smaller version. Decent sportsboat built to a great price. In anything but small chop it shipped water over the bow.
Great for days out with loads of room for friends and family. Good for water sports but the version he had could be a pain with the carpet getting wet and staying wet. (They might have a fiberglass liner now to avoid this ?)
Fuel consumption depends on wether its a carb or fuel injected. Average will be about 8-10 galls per hour. This will go up if you are WOT all the time to 15gph and down to 6gph if you take it easy (cruising at 25kts)
Yes it is, but remember it all depends on your usage. If you are going to use it for a days water sports you probably will only actually do a couple of hours. If you get 10 days a year you fuel bill will still be under a grand a year.
Not an insignificant amout, but not the end of the world either.