I drove close to 50 miles average per day the first 5 months of ownership on L1. At times it seemed like it was charging near continuous but I always got where I needed to go. Some mornings it was still charging as I unplugged and headed to work. But then my miles are in a mild climate. I think you should plan on installing L2 soon but you can wait until you get the actual car and be on L1 for a few weeks.
I just got a free L2 from the EV Project.
I'm also having my L1 upgraded to L2 by EVSEUPGRADE.com because I've heard that the blinks are not always reliable.
A full 16 amp L2 for under $300 (and it will still do L1 in a pinch)
You could look into the EV Project, and see if you can get a free L2 also.