Thank you everyone for your replies. At this point in time I'm aiming for a Tanaka PF-4000 on a new Staton-inc axle mounted kit, and using an 11-tooth sprocket on the gear reduction box (w/a 60-tooth sprocket on the left side freewheel). My top speed on level ground will only be 24mph (+/- 1mph), but with the Tanaka I should have more torque on the long, steep hills I need to climb.
I like the Staton axle mounted kit, rather than other kits, because it not only gets the engine out of my way when I want to pedal, but it also allows me to put a touring-quality rear rack above the rear tire, onto which I can attach a milk crate as well as a right-side pannier. That way I can haul gear, be it groceries or be it camping stuff. I have also conceptualized a way to attach a single-wheel trailer to the rear of the rack for hauling my skis in winter, or my guitar case.
As for the pedal-side drivetrain, I plan on starting out with a 42/34/24 triple front chainring, and an 8-speed 13-28 tooth thread-on freewheel. Eventually I plan to switch to a 44/33/22 with an 11-30, but one thing at a time. I'm on a fixed income and I can can only afford $200/month in upgrades. Planning for, saving for, and soon building a new kit has given me a goal, something to look forward to, a "man job" if you will, at a time in my life when things seem depressing from a certain perspective,...
So, thanks for all the feedback. I appreciate it.