I had similar shop space issues when I got my TM-1. Once the install/set up guy was finished checking things in the cabinet we rolled it about 14" from a wall and set it down and leveled it up. That was 2 1/2 years ago and I have not had to get into the cabinet yet. If I do have to at some point it is really easy to move around with a pallet jack. Of course if moved it would need to be releveled but I check the level one every 6 months anyway. Bottom line is I don't regret putting mine up against a wall.
Hercules
2008 TM-1, 2008 TL-3, 2009 TL-1, 2010 VF-2YT