You want thoughts? Try this one:
"How do you intend to convince any Arkansas court (Circuit, District or on down) that somehow out of this sloppy informal "arrangement" that "B" is indebted to you?
Unless the $3K represents an unpaid loan (not at all likely) any monetary claim against "B" would need to be in the nature of damages for a breach of contract. But what contract has been breached?!
You begin with your post stating that you gave B the $3K as a "down payment for the 10 acres of land", but fail to explain whether the money was to be applied towards a fee simple purchase of the land; a life estate; a lease; or what, and nothing mentioned as to any deferred balance.
Obviously you have been occupying the land or you wouldn't be here. But you leave one to guess as to the circumstances or conditions whereby that occupancy was permissive, or why it is suddenly being withdrawn.
In sum, you have given no reason to believe that you have a makeable cause of action against "B".