Welcome, and congratulations on acquiring this rare MN-made, early Casita! I'd love to see photos of the interior.
So 1983 must be the year they opened shop in Rice, TX. Appears to be the same molds as later TX-made Patriots. Are there some parts that are different, or just the general difficulty of finding parts for old
windows, appliances, and the like?
You live in beautiful country- don't have to go far to camp. Enjoy your Casita!