I want to be able to tell you, that yes waiting will make a huge difference, but unfortunately not. Will it make a difference? Yes, but not so much so, that you'd say Wow!
To cut down on expense, make potions you can sell in the bazaar. Farm the supplies. You didn't happen to say what recipes you were trying to skill up on, but some often give less skill up rates. Those that are completely store bought generally have a lower skill up rate due to the ease in obtaining the supplies.
If you're not into using the bazaar, making potions you will use yourself, is still often cheaper than to buy them from NPCs or players.
Salvage AAs will help save some money as well.
Either way though, skill up rate will be horrid especially as you get closer to 300. I'd say at 200ish it's the recipes you are doing however. Seems like Alchemy really starts slowing down around 240ish un-modified skill. I know I tried some potions at 200ish that gave horrid skill ups and switched to somethign else that worked much better, but I don't remember what either one atm.
You might take a look at the
Complete Tradeskill Guide 5.0 on EQ Traders as well as the Alchemy forum.
Oh, and there's a calculator somewhere on the site, where you can see what the difference is with various stats, to see how many fewer combines, lets say a 500 Wis would than your current 335.
Yther Ore.