I know everyone has different financial circumstances, but I would suggest saving up, even if it requires shooting less for some period of time, in order to be able to place bulk bullet orders.
I have loaded 9mm since day one and my bullet history is below:
First bullet: started of with Montana Gold 115 FMJ paying $350 for 4,000 or 8.75 cents each. Almost gone through 20,000. Then started looking for a little better price.
Second bullet: RMR 115 FMJ paying $290 (with High Road discount) for 4,000 or 7.25 cents each. Will be starting into these soon as I finish my loading my last 2,000 or so Montana Golds.
Third bullet: Xtreme 147gr plated paying $190 for 3,000 or 6.3 cents each. This was with their 25% off sale at Thanksgiving. I haven't shot them yet, still have to start on and get through the RMRs above, but I imagine I will like them based on shooting a friend's loads. If I do like them, I will buy once every year or two at the Thanksgiving sale.
I know I can go cheaper with coated or lead, but for now I am happy with the choices I have made.
As far as getting deals, I think the best piece of advice is to encourage folks to have an emergency fund. Several months worth of living expenses in your account. If you are fortunate enough to be able to do so, and have many months worth of living expenses set aside, then when you see a deal for something you need you can pounce on it.