Asked to be the fix-it contact on 40 voucher doors. Signing up for what?

An owner with about 40 doors across a few small buildings asked if I'd take his maintenance calls. Roughly 30 of those units are voucher tenants. He's offering $1,800 a month as a retainer for triage and scheduling, plus I bill parts and my own labor separately at $55 an hour.

What I'm stuck on is the inspection side. He said the annual inspections "take care of themselves" if the units are kept up, but he also mentioned two abatements last year where the housing payment stopped until an item got cleared. If keeping payments flowing becomes my job, that's a different job than answering a leaking faucet at 9pm. It has a deadline attached to it and a dollar amount per day of delay that I'd be blamed for.

I've never worked inside the program. As far as I can tell, the retainer prices about 20 hours a month of coordination, and I think inspection prep for 30 units is more than that in the two months around recert season.

The decision in front of me is whether to take it flat, or carve inspections out and bill them separately per unit. He wants one number for everything and I understand why. I just don't want to find out in month four that recert season is 60 hours.