It is an item of MAKING MONEY and NOT of producing, transporting or bring to market any goods or services at all.

Given the scope of your work, a simple plumbing leak would not concern me, it's a $200 issue at the most and ideally, it's just another line item when you do rough in plumbing for the kitchen.Being in a Milwaukee suburb, I am guessing it's a 1960s ranch, probably with galvanized plumbing.

Have the tenants take and send pictures of any maintenance items and video chat with the repair person as needed.If you ever get in a situation where you just feel like you can't do it or don't want to do it, you can always put a PM in place at any time. 

I may even think I know just enough to be dangerous to myself.

There are two items that you need to completely solve this problem for your rehabs: properly built Design Boards and a Finish Schedule.

Never use an Expense Ratio %-  do a line item forecast. 

One quote has the items listed, shows the price of each item as $0 and then has a final total. 

I’ll also amortize large items like roof over 20 yrs, and then add $100/mo/unit for general repairs.

Then we review the submitted file items and come back with questions or ask for additional documents it is a normal process.

The inspections have become so nitpicky over purely cosmetic items there has to be an extra $1-2k per year to keep up with the punch list every 1-2 years.