My wife and I just celebrated the birth of our first child, so my gaming budget can be best categorized by one of two epochs:
BC - that is Before Child, I spent a good 40-50 bucks a month or so on various gaming materials, a new rule book, some Reaper minis, etc.
AD - that is After Delivery, I now have zero extra cash and so I scrounge the internet for cool, albeit legal, downloads (I haven't downloaded pirated pdf's). I'm sure one day the gaming budget will replentish a bit.