Ok, now I understand your issue. As far as the center problem, you'll need to know the wheelbase of the MH and the minimum ground clearance between the front and rear axles. With that info you could do a rudimentary test by tying a string the length of the wheelbase to 2 yardsticks at the minimum ground clearance. With the string tight, position over the area that you're concerned with to see if you'd have clearance.
The rear-most clearance would be a little harder to determine but could be done also. You'd need to know the length from the rear axle to the lowest point at the rear of the MH and what that minimum ground clearance is. Add that length of string to the other setup, and test keeping the string in line with the one attached to the two yardsticks. Looks like it'd be a 3 person job.
It sounds bizarre but it should work. Let your neighbors know what you're doing so they don't call in a 'code white' (psychiatric episode)!