We can find people to draw floor plans and do 3d models based on the measurements and pictures that you take (people are overseas, so they are inexpensive.

Larger institutions may give you better terms, but can be a pain to work with.Once you develop that relationship with a local bank and they understand your business model, you can almost guarantee your financing.Just remember, EVERYTHING is negotiable.  

Utility law is outside my area of expertise, but I do understand what being in the business of doing something is, I do know that brokering utility serves is a regulated activity, providing utility services for a profit puts you in the shoes of a utility provider, regardless of the scale of your business may be.   

Keep reading BP there are several ways besides what Jon mentioned you can model a rental to make it bullet prove from scumbag tenants.

I finally came to the point where I decided to take the stress out of the equation.My business model, which has proven to be very successful at retaining long term tenants, is I don't charge late fees.

If you have dishwashers and they are older they use up to 4 x as much water as the current models.

IE I'm interested in your business model that has you wade into this topic?

It sounds like (based off your comments) that Mark's main business model is selling education to his students.  

I'm seeking  a firm that offers outstanding service, expertise and  one that can guide me through this labyrenth of information.

Water Heaters, I'll go basic 6yr warranty models, how long they last I think is more a symptom of how good or bad the local water supply is vs anything else.If it were me I'd pay close attention to the level of materials used to accurately determine your cap ex/repair costs.