Psyche beat me to the punch on the local-hotel idea. Also check your nearest suburban full-service Marriott and look at the lowest available weekend rates. 2 weekend nights with a Bonus Buck or Premium Pound applied might be cheaper than anything. (Lots of avenues to get those certificates if you don't already have them, whether via FT or otherwise.)

Be wary of going the EEO route: depending on how they post it, you might only get 1 qualifying night.