I have free 110 EV charging at my office (not very useful from a power perspective but it has a prime reserved parking space) so I assume that I'm going to quickly grow tired to unplugging my UMC in the garage every morning and will opt instead to buy an additional UMC to carry in the car. I believe I read somewhere that they were going to cost $400 which I guess is reasonable considering what you get but overkill for something dedicated to 110 volt charging. I wish they offered a less expensive lightweight 110 volt "travel charger" like the Roadster had. Has anyone else purchased a second UMC for charging away from home? Is it indeed $400 and is it easy to order?