I'd pull his ass aside and ask him what the hell is going on. If he's not getting it, run it by him that everyone has made a huge commitment to the band and he keeps coming up short. Either he pulls it together or he's out. Simple. If there is a solid reason for this spending (like a new chick) tell him that if you guys are gigging it'll probably starting bringing in an income (and impress the ladies). Trust me man, I had the almost exact same problem years ago, except the drummer was trying to bring in his controlling brother as well. We looked at him and told him his brother was never accepted in the band and if he was going to turn tail then I'd give him a ride home. Never looked back. Sad really. I also had a similar issue with my addict drummer who had no cash for anything, rent or otherwise, but wanted to buy a really expensive one off cymbal. Eventually we relented but he ended up taking over my old band studio with his side band and they started chucking invaluable demos and recordings. Even an old rig I was planning on restoring. Man, musicians some in a wide variety of flavors, unfortunately most of them are rotten either in style, attitude, or lack of motivation.