If there's no permit, there's a chance that the install wasn't done correctly.

Multi-Family may require more maintenance (Con) but that cost may be offset by installing a coin-operated laundry room (Pro)3.

I'd like to start with flushing every few years and replacing the anode rod every 5 years or just once with one of these powered rods.I am skeptical of the very positive product reviews since the review really needs to be submitted 10+ years after the installation to be meaningful and they never are.

They install a virtual assistant, and when broke students call in for POF letters, a virtual assistant signs on mentor’s behalf, saying that, technically, funds exist which could be used to buy the property.

Plus it's something they're not normally doing, so the installation may not be up to the same standard as what they normally do.

Yeah good point, usually in installments when milestones are hit.

Provide the tenant an option to install a security system at a cost to them, since there are no police reports about break-ins. 

We added value by re-doing the whole house, installed vinyl floorings, rebuilt 2 and a half bathrooms, re-painted the whole house, replaced all the hardware in the house, installed new lighting, ceiling fans, re-painted the kitchen, and completely remodeled the upstairs.

I too would look into a fence installed by a professional and ask the tenant to share the expense. 

This includes things like cutting down the grass and installing a drain in the basement.