A couple of thoughts.
First, I read quite a few modeling mags, look at other forums etc. I find that the level of skill shown in the FSM pages is very unusual. I would expect that's because Kalmbach is a giant magazine empire and they get huge amounts of submissions from which to select from. For whatever reason they seem to select models to publish with very high levels of skill apparent.
Look at other smaller magazines and sites. In particular look at the british magazines, where many if not most of the modelers brush paint. Not better, maybe not so realistic, but certainly a skill and a different way of judging things.
My point is that IMO (in my opinion) reading FSM and feeling "I can't do that" is on a par with reading Sports Illustrated and having the same self doubts.
I'm a mediocre modeler but I'm perfectly happy with the results I get.
Also, don't sell your wife short on her patience with you. You could be spending the money in bars, without her on the golf course, or on guns (expensive hobby).
I don't enter contests because a) I don't really care to be judged by other people, get enough of that 9-5, and b) it'd be futile. But that's ok, you just have to do your thing.