You want a place for all you - you should consider buying at least an acre, and just get started with a used Airstream and a few doghouses or something like that. Way less expensive. Way better to think longtime and sacrifice a little now.
And, I know that there is plenty of property for sale in the Roberta area. An acre is probably just $4000-5000 or so down that way if you look around hard enough...Renting to own is a slippery slope for renters...save your money and go buy something in the next three years, and claim it as your own.