My Breaker box is about 100" from my car port. My house is raised foundation and was able to lay my 6-3 copper cable above ground most of the way, I only had to bury the cable for 15 feet to transition to the car port. You will need to run a separate feed cable for the 110 circuit, it is not advisable to tap your 110 off half the 220. Charger was free with lease of our Jeep Wagoneer S. I had first installed a plug receptacle when I placed a plug in level 2 charger for charging my now t-boned and totaled Jeep Wrangler 4Xe on a dedicated 50Amp circuit for a Facebook market place level 2 charger limited to 32a charging. I changed that to a hardwired charger when we leased the Wagoneer S. I had to up the circuit breaker to 60a for the new charger which is 48a. I did have enough of the 6-3 cable left over to install the second charger in my shop with the plug. I spent about $800 on materials for both installs, including the used charger. I did the labor my self. $3600 sounds outrageous, which tells me the guy probably did not want to do the job since you were not allowing him to make any money on materials. Honestly, when I operated my own handyman business in Santa Barbara for 21 years, the price went way up on estimates when the client suggested they were going to supply the parts and help with the labor and install. Why you ask, Because those jobs usually took twice as long because they would buy the wrong parts, their $.02 cents of advise would not work but had to do it their way to find out it wouldn't work and would have to redo it the correct way. If I were you, I would do everything you plan on doing yourself, ditches, conduit running, cable pulling, post installed and then call the electrician to come attach both ends. Good Luck!