I bought a 4 horse, horse/cattle combo. that has a fairly good size tack room its a older WW that is in fairly good condition. I am wanting to use the tack room as a sleeper when I go ride my mules on overnight rides, I think it will be fine for just me, I was wondering about spraying it with spray foam insulation ? good or bad idea ?? Also there is no windows only a top vent, any ideas on putting a couple small windows for fresh air. I don't want to do something that will break the bank just something simple and easy, its NOT something a will be using every week, maybe 4-5 times a year. probably use a little buddy heater or elec. heat in cold weather and may install a small window unit in front under the hitch a lot of the rides we go on have elec. hook ups.