The city has attracted substantial investments from companies like Intel, Google, Honda and more driving job growth, increasing housing demand and boosting property values.

Have you read up on their by-laws to see if you need to use in house management or any other rules?

It's really stupid but but most banks consider the following to be rural: over 5 acres, if it has an unimproved road to get to the house, if it has a barn or horse stables, if population of town is under 20,000 (population density varies by lender).

You may be exempt from Fair Housing laws.

Quote from @Daniel Becker: Don't get buried in the weeds. 30 years ago, people invested by saving money, buying a house they liked, and holding onto it for decades.

Is it more to protect me against fair housing? 

I offered not to raise a rent and if they extend, they could cancel any time to buy their house.

I am planning to buy a house in Bronx, close to the city, I found a single family house 1 and 1/2 bathroom, 3 bedroom, finished basement, garage, and yard,The house looks in really good condition, I already made an offer for 570.000, in melrose Bronx, I know this is not a safe neighborhood, but I do believe the house will appreciate and also I think I could easily rent it since it’s close to the subway,What do you guys think, will a house in melrose Bronx will appreciate it, taking into account it is close to projects and it’s in melrose? 

I watched a video about house flipping, and he said to secure a property before a hard money and gap lender.

For example, a plumbing issue comes up, and Appfolio automatically creates an invoice from the property manager to me for the plumbing services provided by a vendor.