There are enough things that can go wrong on something like this that it seems better to get your money up front if possible rather than relying on the contractor actually paying you every month, and being able to accurately determine what your costs are actually going to be.
In the rare cases this comes up, our price is whatever it would be to construct the service, pull the permit, whatever. Install it and walk away, you own it, my liability and maintenance headache is done.
If we get the equipment back at the end, then bonus, but I don't expect to. We will disconnect for free in exchange for the equipment.
There is a reason that the fine print on the back of a equipment rental form is so long, it's a legal nightmare. The other thing is that rental companies insure themselves for that exposure, you may not.
If it's a job that we are doing the building wiring then the temp is included in our scope anyway.
I did not see who was paying for the electricity usage!
Make sure you EXPLICITLY state that the KWH usage is by the customer and not YOU!
I have several temp services left over from jobs. All are paid for more than once. Build it, bill it as a T&M or flat rate.
So why isn't the EC that is wiring the house providing temp power?