Guilds in Vanilla hardly "required" the usage of potions and elixirs. In TBC, everything I needed was easily obtained by my guild selling attunement carries. Guilds really hated going back in to redo their attunements for new recruits, and we took advantage of it. My repairs were taken care of with the gold I got from just general play. I liked farming for optional cosmetic rewards, and there were a lot of stuff locked behind daily quest farming. That was optional, though, but it did give me plenty of repair gold. I would occasionally farm mats, but that wasn't required. The guild had enough money to pay for our shit.
I hardly remember what I did in Vanilla for money. I was a warrior so I probably just had money thrown at me by my guild so I would tank lol