So you are recommending using the reno boxes, then cutting a hole in the wall big enough for the plate? I know it would look much better and much cleaner doing it like this, I can get to the crawl space very easily, its just a matter of how difficult this is to do, I have never attempted anything like this before. Can you please post a link of these boxes? Thanks.
If you plan it out carefully, measure twice-cut once. And take your time cutting, you should be fine. Watch out for cross bracing that could block your path to the crawlspace. I always like to drill four pilot holes in the corners first, make sure nothing bad is behind it. You can always put a piece of bent wire in those pilot holes to feel around as well if it's not near another electrical box.
So you are recommending using the reno boxes, then cutting a hole in the wall big enough for the plate? I know it would look much better and much cleaner doing it like this, I can get to the crawl space very easily, its just a matter of how difficult this is to do, I have never attempted anything like this before. Can you please post a link of these boxes? Thanks.
I'd suggest "mud rings" instead of boxes for Ethernet and coax work. That is what Home Depot calls them; same as "reno" (from "renovation") boxes, but without the box.
Those look great, internet was activated yesterday (a day early) and it is working great so far. There is a RadioShack here in town, do you think they would have some of the things I need? The closest Lowes or Home Depot is a good 45 minutes to an hour away.