As a pure investment it looks okay, but with a primary residence for my family thrown in at zero additional cost, it looks really really great.  

I looked into Google PPC ads and Performance max ads, but after spending hours creating my ad, it was going to cost about $65/day to be competitive in my area. 

Explain the potential damage and costs involved with the water running continuously and put it in writing letting him know that he is not to touch the chain again, that if he needs service that he should notify you and you will take care of it.Additionally, there are devices you can get that will alert you if your toilet is running.

They charge 1% in the form of a closing cost to the buyer.

However, that requires us to dig down the basement floor to meet the ceiling height requirement (it's got the egresses and 2 exits already), and I think that can easily cost us $100-120k.

But, like everyone, we are also interested in increasing cash flow and ultimately want X amount of cash flow in 10 years so I can retire.

Every item has a lifespan and collecting maintenance/replacement costs should start as soon as an item is put into service.There are lenders that will provide HELOC on rental properties but they are not extremely easy to find.  

A bad tenant will cost you much more than that.

To answer your question, it is possible, and quite costly, to have individual meters installed by the city.

If your all in costs are 115k, the loan amount would be 92k (80% LTC).