Sorry to hear you are disabled. All the more important to choose an instrument that fits your abilities well. A compact instrument that cools down quickly helps. As does a lightweight, easy to handle mount, unless you have access to a permanent mount.
At a time in my life, I was disabled for a few months, so I can relate to that well.
A good 3” doublet is a lifetime joy.
After 40+ years of observing, I appreciate such an instrument more than ever. And focus on what it CAN show and how easy I can take it out under the stars. Often.
A 4” is a great scope, but already a substantial instrument to handle and mount, especially when you are disabled.
A 3” apo doublet is much easier to use and mount.
Of all my scopes, the one I use most often now and absolutely love for what it shows me, is my superb 82mm Nikon ED.
Many a time I stare in the eyepiece in disbelief. It’s images of the universe are so detailed and beautiful. And for sure, that is what the FC-76 will bring to it’s observer too.
Go for it!
For me, the quality of the optics in a scope are very important in how the beauty of the universe is conveyed to my eyes and soul.