The majority of teams in the Conference are full time - in fact at a guess there are probably only two that arent. There isnt a great deal of funding from either the FA or Conference, but I would guess sponsorship money in football is greater than in RL due to the extra games and perception (justified) that football is a more popular sport.
I also dont think that you have to have mega bucks to be full-time. It obviously depends on how much quality you want to have in the squad, but I doubt very much that our wage bill is a million miles away from when we were last in the Conference. The club is well run (regardless of their attitude to the supporters), it is probably doing more commercial activity than ever before, crowds are at a decent level and admission prices are above average.