The definition of qualified property under Section 179 was expanded in 2017 under TCJA to include the following real property improvements to nonresidential buildings: Roofing Fire protection and alarm systems Security systems HVAC systems So you can expense roofing under Section 179 as long as it is an improvement to a commercial property and meets the Section 179 criteria. 

Isn't some sort of certificate of compliance supposed to be secured by the city inspector saying as much?

.- Im thinking of not charging security deposit because of all the strict MA laws and just using the last months rent as a sort of security deposit, thoughts?

If they don't need an "official" floor plan, there is a free app where you walk around the room with your mobile device pointed at where the floor and wall meets.

Qualified mortgages (VA, FHA, conventional etc.) get underwritten to Fannie/Freddie/Ginnie standards and get sold on the secondary market as securities.  

It's a very comprehensive of how to safely find and fund a private money loan secured by real estate that has a lot of equity protection.

For borrowers with low or mid-range credit scores, what are some strategies for securing hard money loans?

It's in the BP bookstore and a comprehensive guide to finding and funding a private money loan safely and secured by real estate.

If you’re in the fix-and-flip game, you know that securing the right funding can make or break your project.

@Marvin Bracamonte - If you bought you're first multi as a house hack I've heard you have to stay in the home for a year before you can then buy your second house hack under the presumption that you'll be living in the second multi and securing a loan as an owner occupant.