nmplott, I have one acre fenced for my dogs. My fence is 6' high. Most don't have to have a fence that tall but I have lions and bears walk around my place every month so any lower fence and they can jump it. Attached to the bottom of that fence and laying inward towards the inside of the area, I have a 54" fence laying on the ground and buried under 6" of dirt. It is attached to the vertical fence at the bottom so it is impossible for any dogs to dig out. You have to use class 1 galvenized fence if you plan on burying it so it doesn't rust out. I'm going on 13 years and it is still in great shape.
I keep all my dogs, all males, together 24hrs a day. One 8 foot long insulated dog box all the dogs use when its cold. One heated water bucket. Extrememly low maintance, about 1/10 the time as messing with kennels every day. Going on 13 years with this setup and will never go back to kennels. Foot problems are nonexistant, conditioning is no longer an issue, no barking because they are bored sitting in a kennel every day and the best part is I haven't had a dog to the vet in 12 years for any health issues. Kennels cause all kinds of problems mentally and phsycally with your dogs. I've come to hate them after going to this setup.