Quick question, how were the prices in the spell availibility by market class table derived? In my Dwimmermount Campaign, I have decided that arcane casters are more rare than divine casters (except in Yeth . . however it's spelled). I want to up the cost of arcane spells (especially 1st lvl) and want to make sure there aren't any ripple economic effects I haven't considered.
Reduce the availability of spells and the availability of arcane henchman in the same proportion and you'll be fine.
There are probably minor second-order effects that "really" would occur (lower demand for monster parts, say) but I wouldn't lose a moment over them.