When I first started, I was told endlessly to just buy a coolerdor (literally, an ice chest set up with humidity control). I remember there being a great sticky about how to set one up, but I can't seem to find it... Will edit if I do find it. As far as humidity, heartfelt industries makes beads that control humidity that are probably the best you'll find.

It sounds a bit extreme, but I wish I would have set one up when I started... I'm about to have to set one up shortly.