I just started my HHJ about 6 weeks ago, so I had to stock up from scratch - flat iron and products. I've probably spent about $400 so far, but I'm sure it'll go down to about $50/month for me and my 3 DDs. When my husband's friends tell him how much their wives and daughters spend monthly going to beauty salons every 2 weeks, he thinks we're quite a bargain.
However, this board is making me a conditioner and oil junkie. I bought 9 or 10 conditioners in the past month. I LOVE CONDITIONERS!!! Sometimes I'll use just one to see how I like it, but most co-washes (4x/wk) I mix them all together and add EVOO, coconut oil, and castor oil. My hair loves every conditioner I've bought. Thanks guys for the conditioner tips!