So I have two brothers that submitted an application for a property: one of them qualifies based on the requirement, the other does not, he makes about $1000 net a month when the minimum is somewhere around $2400 net monthly income, but combined they bring in enough to meet the minimum.My question is, can the other brother who is qualified be a "co-signer" even if he is going to be living in the same place?

Buyers will need to get a personal property loan, just like a loan for a car or a boat.I expect that tiny homes will be a depreciating asset, not subject to appreciating values like stick-built homes on owned land.I think the best application for tiny houses is to address a bonafide local housing crisis - especially for a group like homeless veterans.  

Assuming the former is true in the previous question, does this 6 month period imply that I can't actually start the application process itself until Day 1 of Month 7?  

It is my understanding that their business works by helping you find the best credit cards to apply to based on their database of previous applications. 

So I talk with them and get an application.

It's better (and cheaper) if you bring contracts to the attorney to review and ask them what changes, if any, you need in order to make it applicable for whole sale deals in TN.  

BP also has resources for screening tenants and applications.

Best way is to obtain authorizations for release of credit, tax returns, assets and liabilities, then send copies or get several originals to use, mail them  and obtain information directly from the source, this cuts out the chance of fraudulent statements.You also need to underwrite the type of business, what hazards are present, toxics, fire, insurance coverage, competition with other tenants, traffic counts, environmental laws applicable to them as well as your infrastructure being sufficient for tha use.....electrical, plumbing, traps, fire codes, etc. 

Do you have each of your adults in the unit (maybe not necessarily the applicants) fill it out?

We have a place that we have some section 8 applicants and I'm wondering since the rental subsidy voucher is only under one of the renter's name, does the other tenants who are 18 and up be subject to the same screening process credit + background check as the main tenant who will be paying rent from the voucher?