get one of those waterfall things at the mall stands. should be less than 20 bucks, one part pine sol, one part water. or use essential oils. or ona.
get a fabreeze carbon filter thing, 15 bucks, home depot. includes fan. replace filter every 2 months, 5 bucks.
radioshack has a air purifier on clearance now for $50, originally 200.
get a 5 gallon bucket, a honeywell fan(fits perfect) blowing out, some ONA in the bottom of the bucket. 30 bucks.
crystal cat litter can be used as scrubber. 10 bucks
go to a nice restaurant and "borrow" one of those time released air fresheners they put in the bathroom. 0 bucks.
grow a strain like c99 that has low odor.