You will want to try every system to see if it works. The biggest issue you will have is to determine how age has effected all of the parts.
Chassis wise I'd be concerned with the age of tires, belts, hoses, rust on fuel lines, hydraulic lines, etc. Cracks on tires, belts, & hoses can mean a potential for failure.
House wise look for signs of water damage. Any evidence of leaks most likely means consealed damage & dry rot.