That actually doesn't sound too bad. May want to do a little more research I know roln 20s just got a pretty good deal on his rims+tires with a few phone calls.
This should get you going...
rims+tires thread (http://***boat.net/forums/showthread...ght=rims+tires)
http://www.hotboatpics.com/pics/data...side_1-med.jpg
http://www.hotboatpics.com/pics/data...wheels-med.jpg