Wouldn't really make F/Ps in general "RICH" It would make it easier to sustain/even profit (with decent RNG on equips) for sure. I don't currently sustain, to even think this is foolish. Sure, I haven't been losing as much as a warrior and the reasons for this are very obvious. Warriors would lose more than me training virtually anywhere. Teleporting through monsters, sealing and just the large mana pool I possess with a hyper body mule + only training using elixirs just puts me at a huge advantage. I still lose a decent amount of mesos despite all this. I went into leafre with a large amount of mesos 2nd only to MrKrabs and I have basically finished my gear so I don't care about losing mesos, anyway. If this suggestion helps others (don't think it'll do that much but it's something) then I support it. I also support a deep ludi exchange because ludi is in need of some love.
This isn't really relevant of the topic but using me as an example for the class F/P is stupid. I have taken advantage of so many things since I started playing, advantages other F/Ps will never have. Good luck to any upcoming F/Ps (if there are any) who try to mirror what I've accomplished.