i can't see myself wanting to drive a coffin for years - i've got a bike for that

i have always wanted to build one, and am now in a position to pay for one but would not do so if it will lose me money. sure i want to enjoy it for a bit after it's built, but not hold on to it for years and years.

also need one for the larger build of chap (as in taller, not particularly lardy). what are the options?