Been thinking more about the electric route. It may be a way to get some strength back in my knees without hammering them too much which is happening now. If my commute was half the distance I don't think I'd have any issues. It is what it is though, maybe electric would allow me to do the distance with much less strain and be able to build strength over time.
If I did go that route I'm leaning strongly towards converting the commute bike. I think I'd lean towards pedal assist only with no throttle and a small motor. Maybe 250W would be enough to take the edge off.
Need to do some more research. There is an ebike dealer in the next town over. I may stop in there to see what they have.