I think the everyday life skills are definitely a good idea.
Personally I thought of an "Alchemy" skill which would allow you to collect ingredients to create potions and/or lixes, like it starts of small, with you being able to create maybe 50 hp/en point potions but the more you create the better things you'll be able to make as the skill will level if you understand. Ingredients should be a common thing to find, like not a rare thing, but to make it a bit harder the ingredients for creating minor potions should be in a low lvl mob area whilst ingredients for better pots in a higher mob are if you understand.
This would enable players who can not afford to spend their real money to also get items like elixirs and potions in an easier way. But it also wouldn't make it too simply to get your hands on these things as you'll need to train your alchemy skill and collect ingredients etc.
It's not too hard to be better than platters in this game. I am against any way of making plat store items outside of real money.