South Dakota possibly Texas domicile questions

Look into establishing residency at Americas Mailbox near Rapid City, SD. All you need to show residency is a reciept from an overnight lodging establishment to prove you were in state. Some US Mail sent to you at that mail forwarding service address for your drivers license and registration.
The rest is a piece of cake, likely easier and less costly than any other state. Especially insurance and vehicle registration.
Explore all options before choosing a domicile state.