Looks feasible to me. I'd be doing a half roof roll away to the north or maybe the north rolls over and above the south end, therefore no lawn coverage or poles needed. I'd have to think a bit about how I'd do it but always take advantage of what you got.
You say you have no shortage of sheds. Is this the best placed one to use ? Looks to be quite handy to run power into but has it got the best sky parameters ?
I certainly use my gear far more than I would if I had to shift it every time. Even just for working on setups etc. Today I installed BYE and tested my new camera over a few short sessions during the day and was still able to keep my wife happy with her jobs and requirements as well.
Start planning ....
