should it really be limited per gold ? know it works like that in D&D but as i see the gold can come really cheap resource, should the spells learned through scrolls be limited by something else, or not limited at all ?
Scribing spells into spellbooks costing money is one of those features that dates back to the original game. It makes little sense as currently implemented but has previously been justified in D&D as taking up valuable materials. This isn't terribly convincing when you are scribing scrolls in the middle of a beach with no access to anything better than a quill plucked from a passing seagull and a dead crab's innards to make ink. Still.
It is really simply game balance, acting as a brake to scribing everything that comes your way. I don't think it need be limited by anything else, and I would actually be happier with it not being limited at all (except... balance). Possibly a later implementation could replace the actual gold coins used with having to buy special inks and new pages for the spellbook? Not sure.
