They have a two-car garage and both have to park outside. There are plenty of families that do this, but in that case, they usually use the garage for a hobby like woodworking, or store lawn equipment in there. In most cases, this still allows room for one car to park inside. Jack and Tammy's garage is just filled with... junk. They may have a lawnmower, but there has never been any evidence of lawn care in any video. It's almost always overgrown and they probably mow it every two weeks at best. Why do they need all this shit in their garage? How are they affording it?
Do most houses in that part of Tennessee have basements? If this is the garage hoard, any basement hoard is going to be worse.