donald;
Well, if they deliver it and from then on you you are lucky enough to have a concrete floor you can use lengths of pipe under the case to roll it about.
My plan when I finally score one is to have a backhoe or tractor with bucket set it on a pad outside then build a doghouse type structure over it so I don't have to deal with going thru entry doors in the power room itself.
You may find it cheaper to buy enough heavy cable to connect it thru the wall than move it into a tough spot. In my case I can set the battery within 5 feet of the inverter so a few feet of massive cable will save the nightmare of getting it across a gravel floor, thru a standard 32" entry door and still not be much closer inside.
You could also move the inverter easier perhaps than the big battery chunk.
A wrecker could set it anywhere it can get to.
So much depends on what you have and where it has to live.
Can you rig an overhead trolley?
Might look into how machinists set heavy equipment. You would be amazed at how they yank and crank massive things into place. jacks, rollers and come alongs can do a lot.
Too many variables to offer much solid help.
It might be easier to set it outside and work around it than try to get it in some confined space. Especially if elevation changes or small doors will be involved.
Just first thoughts.
By the way , I took the [&] out of your subject it kills commenters ability to post.
TomW