HK, are you in NYC? I commute to NYC and have seen chargers in some parking garages there. I think that you should still pursue installing a level 2 charger at your home. You're not in a hurry since you have alternatives, but I think in the long run you will be glad you did. Also, many of the utilities, including PSE&G in NJ were I live, are subsidizing the cost of installation of Level 2 chargers so a chunck of that $2,300 could be covered by your utility. My Brother in Law has a detached garage at his home which made installation a bit more cumbersome also. It sounds like you should upgrade your electrical service anyway. Just my thoughts. Good luck.