I was looking at a yetti fish house a few weeks ago, they look to be built nice and clean and are 100% aluminum exterior including the frame. I think the guy said like 5500 and the inside is insulated but that is it. Check them out.
Ball joints are expensive dude, as long as you have the front end all torn apart you might as well do replace the u-joints up there too, It is a minor cost now to avoid having to to it in a few months when one of them goes to hell. The cost all depends on where you take it too. Good luck!!
I agree with chuck I had the same issues with my old strikemaster until I did the carb. It ran like a top after that. If you dont do this already drain all the gas and start it and run it out of gas b4 you store it and that will prevent the carb from getting gummed up over the summer