Being a Newfy, l'm sure you're good at fixing things. The Sprint you've been offered is a rare bird but it's components are all standard equipment both drive train and body. The g30 is long-lived and parts are available. I let Canadian Tire do some fixing and they get my parts. The camper is fiberglass front,sides and back but the problem is the roof. All appliances are replacable if need be.
As you might have guessed, I own one-the same model but 1990. It has tbi and the 3 speed tranny. I bought it two years ago and have spent a lot of time fixing it. It gets 14 mpg at best and likes to run at 90 kph or less (55 mph). The small size means it has more hp/torque than most older rv's and it's comfortable in town