Many thanks! Just so happens I have about 350' of copper, flooded RG-11 in storage, as well as the fittings, connectors, etc. I also have a shed of sorts to act as the midway, although I'll have to get power to it. All your instructions sound reasonable and plausible, and the installer compensation would be well worth the effort. I'll be looking into the power and amp equipment purchase immediately.
Appreciate all the advice! It's great to be able to access this kind of help at the Bar!