We love our 2003 Minnie. We have owned her for three years. Would we purchase again? YES! The dollar investment was much less overall than a newer rig.
Last year we replaced the original tires and batteries. We replaced the sewer hose, and do regular engine maintenance. We replaced the old heavy tv with a light weight flat screen. The microwave was one of the recalled Samsungs. Samsung sent us a check and we bought and installed a new one. BTW tank sensors seldom work correctly no matter what the age. :-)
Have a mechanic check it. Check for any water damage (sight and smell).
Good luck in making a decision.
Mike Leslie
2003 Minnie 29B