Howdy people. So I'm trying to come up with a strategy for taming our crawl space below the house. The goal is to improve air quality, cover the 4 vents for more energy efficiency, and keep any moisture out. We're not super flush with cash at this time so trying to do as much d.i.y. as possible. Has anybody around here tackled a project like this? Any advice or tips on this would be received gratefully. Should I put down a vapor barrier first thing? I'm anxious to seal the vents because the house and floors get super cold in Winter and I suspect this is a big part of it. Where should I insulate and what kind? These are the kind of questions I'm trying to figure out. Thanks.