It is illegal (see below article). 

Verifying last 2 years of rental history very important!

Keeping the good relationship with her and thus your grandkids is more important that the rest of it so make sure you are prepared to give and sacrifice money if and when it is required and have certain things agreed up and in writing up front.

First, it’s important to know that manufactured homes are seen as a slightly riskier investment and consequently have a slightly higher interest rate.

This is probably the most important thing to figure out because if the Tenant had not paid you for this then this would be money out of your pocket and next time it might be your money that you are out. 

The most important thing on your first deal is to keep the risk low.

Clicks and conversion rate are extremely important.

I think it is really important that you establish a good relationship with an independent insurance broker! 

IMO its important to have plenty of reserves, it's not if something goes sideways, it's when it goes sideways.

Curb appeal is also very important.