Any opinions on a good "bang for the buck" (in terms of both initial cost and operating cost) dehumidifier brand for a crawl space (about 700sqft) ?
The best bang for the buck is to first put down a good barrier on the ground to stop evaporation into the space from the ground. Then, you may find that just ventillation would suffice, either mechanical or natural. Only then would I consider dehumidification after I'd stopped influx of as much as I could.
Important note - I'm not a pro
Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013