a good pair of blades will set you back atleast $70...
OP, GO FOR IT. I love my summer setup, it's so fun. and because the offseason is so long here in the east, i get a lot of practice time until next winter. plus, if you keep your rail skills sharp over the summer, on top of being a lot better at rails than the previous season, it'll also be an easier transition back to riding at your mountain opposed to that first week getting all of your tricks back etc.
sparknotes: ya, good idea.