I think it depends on where you live. Here in Az., at least in Cochise County, you have to have at least 10 acres and a caretaker's name on file with the county. I looked into this a few years back and may have forgotten some points, but those were the two major ones.
As far as exhuming relatives and moving them, I would be inclined to think that would also depend on the county/state.
Ponyboy, embalming is not required by law, but if you are going to have an open casket funeral, I highly recommend embalming. Of course, if you don't want people at your funeral, open casket/no embalming would probably do it. Especially in Texas in the summer.
Edited to say embalming must be a state to state type of thing, also.
In 1998, when my mother died, we were going to bury her on the property. After doing some checking. we found that my mother and father could both be buried in the same grave at Riverside National Cemetary. My father decided that would be the place.
My mother was placed in a sealed casket, no embalming. My brother came out from Ca. and drove her to Ca. in the back of his pick-up. Sounds kinda shoddy reading it in type, but everybody wanted to do something at the time and that was how my brother wanted to deal with things. Her death was sudden and unexpected, so no real plans had been made in advance.
Anyhow, check your local laws, they do seem to vary, place to place.