It would help if you would tell us a few more things. How much land are you interested in? Rather than a shotgun of states, pick a few to start with, and tell where in those states you would prefer. It would help others in suggesting sites.
Read through the rest of the real estate here, it will give you an idea where to start. For example, here where I live, land varies between maybe $500 and $4000 an acre, depending on where it is and how big the parcel. (Example, one section of land is 640 acres, it might
sell as one unit for $500 an acre... and that is how it would have to be purchased. In town, it might be having to buy individual contiguous lots that are unimproved, and run $4000-5000 an acre that way). Land here also needs a well and if you are getting a small parcel, you might face that expense as well.
When do you wish to relocate, or do you want to buy and visit a few times to get things started, then move on? Or are you going to show up with your proverbial covered wagon to lay claim and get started?
Would you be willing to go in with someone else to purchase a piece and either share or divide it?
Do you want totally raw land, do you want certain improvements already in place (or are able to provide them quickly, like a well), or perhaps go for a farmstead that's already there with a few acres around it (the most expensive but possibly the most instantly liveable, especially with children)
It looks like you would like central Appalachians running across from North Carolina and Georgia across to Texas, so somewhat mountainous and forested; then Alaska, Montana and Idaho. Possibly zones 4 to zone 9? Montana, consider a few
deep roots acres at Wheaton Lab? (check out Paul's podcasts first). That would land you with likeminded folks...
We welcome you to Permies, and hope you can find your dream, just help us help you.