I bought a Keter shed, which has twin opening doors about 1.4m wide, and no lip under the door like tin sheds have. My scope is on a large triangular base with wheels and leveling T bolts (similar to the JMI wheeley bars) and it all works a treat. I wheel the scope out when I want to observe, and level it up with the T bolts and I'm off and running.
I found that I didn't have the opportunity to use my scope when I moved houses about a year ago as it was too difficult to move outside and set up. Having the scope live outside has solved all of my problems, and I'm finally back out and under the stars at night where I belong!
PS> The bit I left out was that I had to level a sloping corner of my yard by hand, compact down about 2t of crusher dust, run power to the area, tile it all with spare terazzo tiles and THEN erect the shed - mostly in 40 degree heat
It was all worth it though!
If you can do it, set up so that your scope lives outside and reduce the pain factor of setting up. You'll probably use your scope a lot more.
Dean