"There's 2 types of house's, 1 where people know they have rats, the other is they don't know they have rats"Poison is a really bad idea, especially when tennants are involved.Hire an exterminator a document everything.

Find an architect who specializes in this type of work, and who is very familiar  with the building department

Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.

I have already received my preliminary documents from her for my accountant.

If the answer is no, that means they are a broker of some type.

Lease violations are documented.

I am familiar with being licensed thru nmls but never heard of any other type of certification

Risks: rates go down and you have to pay a prepay of 2 or 3 %; you have to sell and pay the prepay; rents decline & you can't make the payment like any other type of loan; cost upfront a little more than conventional; need to find experienced broker licensed in the state where subject property sits; servicers are bulldogs. 

@Cheryl AbramOut of curiosity what type of return were they promoting?

Promissory notes are transferred by endorsing the back or a document called an allonge.