140+ legitimate hp in a Type I engine is begining to push the technology toward the ragged edge....thus requiring more tuning, more service, and keeping everything in good order. If you are not mechanically inclined you should stay with a Miata or something similar. I say that not to be unkind, but these cars require maintance..... and there are very few places that have a core compentency in type I VW engines, much less hot rod versions, around here.
On the other hand, there is nothing about a type I engine to fear, but tuning dual Webers in 44 or 48 mm sizes, changing plugs, changing oil, setting valve gaps, and the like are all frequently required, if I can do them, so can you....but if you are not so adventuresome then your ownership is likely to be less than satisfactory...