You have $606 after tax dollars to spend on the rest of life's expenses, including investing, buying flowers for your significant other, cell phone bill, water/electric/vehicle expense/food/childcare/hair cuts/vacation. 

If you don't have water, sewer, and power at the property already, it will substantially limit how many units you could feasibility build even if 100% of the land was otherwise usable.

In fact, having a knowledgeable team (agents, brokers, property managers) can help you secure better deals and manage your properties efficiently, especially if you're aiming to be a passive investor.Holding Company: Setting up a holding company for your LLCs is a smart move, especially if you're planning to build a sizable portfolio.

If the landlord is paying any utilities that are based on usage such as water, then I might discuss a rent bump to compensate for the anticipated increase in usage and address that with the lease update adding the person as an occupant. 

Aesthetics won’t be an issue and it will pay dividends in the long run with eliminating landscaping/lawn and water costs.

If not, what happens when neighbor owner isn't maintaining their roof and water leaks are impacting your tenant?  

I'm currently using Podio but it's very cumbersome unless you know exactly what you want with it or have someone full time to make it efficient.

They put levels on the pad and check to see if there are any noticeable water entry points.

For better tax efficiency, transferring full ownership to your mom and inheriting the property upon her passing is a solution to consider.

Will I need to pay for sewer, or is this included in the water bill?