It's the same reason people gamble.

There is statutory, and now Fannie/Freddie guidelines, that exempt many transfers from being subject to the Due On Sale Clause...asset protection/estate planning purposes are typically covered.Why Use LLC when an Umbrella Policy Does the Same?

You need to follow all Fair Housing guidelines. 

FHA does have some guidelines to purchasing due to job relocation or 100 miles away from your existing primary.Do you currently have any mortgages appear on your credit? 

Each lender / investor will have their own guidelines in terms of reserve requirements needed on purchase transactions. 

You are the second or third person to highly suggest laying out a set of responsibilities and guidelines and expectations legally.

Roth IRA/SDIRA has income limitations, you can check IRS/CPA for current guidelines on that.    

They will know your companies requirements and guidelines.  

It's a highly nuanced industry that isn't very regulated so you will need to know what you can and cannot do legally and then create some personalized guidelines around what you want to fund and what you want your returns to look like.

I believe the new appraisal guidelines count any livable above ground spaces with less than 7' head height similarly as they do below ground space.