Unfortunately people do not take this into consideration good point. Or they will build a 2 story house with steep terraced steps on the verge of retirement and then within a decade they are forced to move again because the house doesn't fit their health conditions.

If you are going to build a place to stay the rest of you life make sure you can stay there the rest of your life!

But yes, to enter into a federal lease I wouldn't do it, nor an HOA, or any sort of encumbrance that is legally disputable by a 2nd party like a fee, due, mineral/water right, easement, shared driveway access, anything no matter how remote the possibility of dispute.