Treat investing as a genuine business rather than a side hustle.

He has a big business, managing 1,500+ doors.

@Jay Samudio great advice from @Melanie P.Also, in our 24 years of experience, a tenant that has to get emergency relief typically ends up behind on rent again very soon.Be sure the tenant cooperates with providing documentation explaining why they fell behind and that the problem is highly unlikely to repeat.If they won't cooperate and state, "none of your business', then what does that tell you?

On the other hand, my most recent apartment purchase was from a large, well-established REIT that appears healthy, and I have not been very impressed by how they ran their business.

Creating an US business entity to purchase the properties. 

I want them to send the check to my attorney for the closing on a specific property.I know that some of you are so eager to launch this new phase of growing your business that you really want to take that first check but don't do it.Here is why.

Will the mentor help throughout the business plan?

Find a good qualified realtor that knows the area well that is willing to not only work with you, but teach some of the business from their perspective.

If I get a small construction loan to the property and pay interest expense, would this qualify as a business expense (adding pool and etc)?

Check out zen business.