The federal tax credit ended in tax year 2018. I installed two Open EVSE in my garage, and ran a 100 amp sub-panel. I did all the work myself and was able to claim about $300 of the tax credit; can't claim own labor so it was all materials. Even then, the credit was capped at $1k.
The EVSE run between $500 - $1000. Add in the cost of a residential electrician, and I'm estimating $3k total. If it's commercial, then double that. If you have to trench and do concrete work, double it again. Get into a ROW with other utilities, even worse. It gets expensive really fast.
The level 1 charger for my 24 kW*H Leaf says 24 hours for a full charge. Forget about it for a Tesla.