I must be the only one not saying get a small set up.
Not sure if you know I have and am still having serious medical problems including arthritis in my spine and 3 collapsed discs. My Son carries my mount out for me but like you I have always wanted a big scope.
A few months back I picked up a 10" celestron starsense quite a few pounds to shift but I bought some really sturdy wheels which have brakes on them, I can wheel it out and be viewing in minutes I dont tend to do that I roll it out and let it cool down for half an hour.
On occasion I have just rolled it out put the smartphone in and gone ok at the beginning the views are not as good but I am out and viewing objects, if the weather turns takes 2 minutes roll back in.