It would take a lot for water to penetrate 4 layers of roofing material. 

@Mike Reynolds, the material is rubber.

Before I got started I got this book and felt it was a pretty thorough overview:How To Rent Vacation Properties by Owner Third Edition: The Complete Guide to Buy, Manage, Furnish, Rent, Maintain and Advertise Your Vacation Rental Investment Paperback – November 1, 2013by Christine Hrib-Karpinski (Author)

(House hacking is possible and done here, but not without a new septic, and "hacking" would involve and ADU, as hubby would never give up the basement, which is 100% understandable.)I have however both contracted out and done a lot of work myself using various materials on various houses I've lived in, and I've been reading BP since 2014 (didn't make an account for several years until I was on the verge of making a go at Section 8) and other forums for longer. 

I have the program set and my letter designed, so I’m moving on to ordering materials.

Do not overthink it, you can wholesale houses without being licensed in Michigan as long as you have the proper disclosures in your advertising.

They are marketing material, a flier essentially.

What type of steel frame material?   

@Shawn Gardner - First off you are not alone - Managing general contractors, subcontractors, materials, vendors is a full-time job.I tell every one of your clients that the project is going to take longer and cost more than I tell them no matter what. 

Although it was much more delayed (a whole year) because of issues breaking ground on the community and then hindered distribution lines for materials, it ended up being a good deal for us.We’re getting a 13% CoCROI and the appraisal came in for 8.5% higher than the purchase price.