Re: 250+ Lbs frame and wheels recommendations
I agree with Kioshk. A decent set of alloy rims should hold up just fine. I have untold miles on mine and I am usually 250-275 lbs...plus I've been known to carry a #85 lb welder in the basket. I've gone through many tires but never had a rim issue. I use a stock ragjoint properly setup and have never broken a single spoke or bent a rim. A sprocket adapter is the easiest way to get a reliable driveline, but the stock parts work fine if correctly assembled.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.