Can you confirm that your solution is to charge at home using UMC plugged permanently into a 100A NEMA 14-50? I am starting to learn that this is a popular option.This is my 4th year with a Tesla. The original UMC is still in the same place I put it in January 2015. Cost was $800 to have a separate 100A run - which was in the basement opposite side of the house, going through the ceiling, up to main floor, then over the garage and back out. Took the guys ~3 hours to do it.
I did multiple 500-100 mile trips, never took the UMC with me. It sits nicely on my bicycle bottle holder screwed to the garage wall ($0.10 for the wood screws), and with the cord nicely hanging on the $25 Tesla cord organizer. With this support there is no tension on the 15-40 socket, which can be a problem (some guys early on had theirs melt due to faulty connection).