[Bailey'sMom]

Additional consideration is that you will want to put the back jacks down. How much of a drop will it be at the back of the retaining wall? You will have to have the jacks on the retaining wall portion. Depending on how much it drops off, and how tall you are, it might be doable to open and close from below.

I just went outside to test it out, and I would say it could work as long it doesn't drop off more than two feet. BTW I am 5'10"

Love To Camp is right in allowing an extra couple feet for standing behind it to open if you decide to keep on one level.

Another consideration is future planning. What if you start with a smaller TM and then you upgrade later? Will you kick yourself for not having made it a couple feet longer?