If you decide for outside storage, I can tell you we pay $1.50 per day for the days it is in storage. Since it is really winter-like right now for us, that would be about $45 a month. If you want to research the cost a little, there was a big chat here on the JOF about a month or so ago. I'm sure you can search "storage" and find it real fast. The prices varied a lot because some was inside and others were outside. Good luck!
Dan & Christine (and Molly)
2015 GMC Sierra 4WD Crew Cab Short Bed with Max Trailer Pkg
2015 Jayco White Hawk 27 DSRL