We have a 19 ft long garage- with a 7 foot clearance. Our last trailer was 19ft 3inches. We managed to get it into our garage because there is no sheet rock so the end of the hitch would have to fit in between the studs. We are also borderline on the height, and our driveway is long and more than just a little sloped. Military precision was needed to get that thing in and we use this.
http://www.powercaster.com/
Our new TM is much shorter, which makes my husband very happy.