It's a smart idea especially before the rain season. To do some leak prevention maintenance. Just get a caulking gun with a good roof caulk. And visually inspect all the usual places a shed may leak. The peak, around the gutters, around windows around the door. Put a dab of caulk around anyplace you think may leak, it won't hurt anything so put as much you want. If your shed was built well,it would go for years without a leak.
Who can move my shed for me? That is sometimes a difficult question to answer. There are no real "shed movers" in the phone book. I would start with contacting the place that you purchased the shed from, they may come move the shed for you. If not then maybe an actual moving company.
If you're thinking about getting a 'vinyl' shed . Don't ! The first thing to hit it in the winter time, when the temperature is below freezing. Will probably Crack the dang thing.