I want to put a dehumidifier in my crawlspace. Ground has been covered w/ 6mil plastic. Vents have been covered and sealed. As much as I would like to, Aprilaire and SanteFe are not options, way more than I can spend. Is there a decent unit I can use that won't break the bank? Crawl is a little under 1300 sq ft. What capacity should I look for?