The road for instance, will have be designed and certified by a civil engineer, including drainage.

Just some thoughts... this may be deeper than what appears on the surface.

The stairs would be a great idea and I'd look at taking care of the landscaping and drainage..

Since the black mold issues surfaced in the 90's, many people have simply walked away from homes that were found to have mold.

I enjoy reading Brandon's stuff, he does a great job at scratching the surface, but I'm not seeing any in depth analysis going on, you'll have to do that yourself.

Allot of people under estimate the knowledge, ability, and experience required to work on houses and house systems such as electrical, plumbing, framing and or addressing possible structural issues, possible issues with foundations, drainage etc. etc. 

I am seeing more and more people looking for hard surface flooring- I even had one prospective tenant call and specifically ask about our apartments without carpet since she felt moving into a place with carpet was like wearing someone else's dirty laundry!  

I have never looked at this except on the surface but thought it was worth mentioning.

Literally every surface of every room, and then some. 

On the surface, it may seem like getting a 10% return with rental property (with a property manager) is the same as getting a 10% return in the stock market.