You need to discuss these questions with your landlord/tenant attorney and find out applicable laws and customs. 

Immediately after getting an LOI or contract i request the following items....Exhibit BInventory of property tools, supplies and personal propertyExhibit CService contracts including trash, laundry, extermination, lawn service, etc.HVAC and/or boiler reportsExhibit D Property management license (if applicable)Certificate of occupancyExhibit E Certificate of insuranceInsurance claims history for the past 2 yearsExhibit F Commission agreements with the leasing staffCurrent property management contractAny other vendor contractsOther Requested Due Diligence DocumentsLast 2 years of financial operating statementsA year-to-date operating statementLast 6 months of bank statementsUtility deposit registerUtility bills for the last 2 years.Property tax bills for the last 2 yearsIRS Tax returns and addendums for the last 2 years (as relatedto the property only) Articles of IncorporationGood Standing Letter from the Department of RevenueAny licenses in the name of Sathyam EnterprisesRent roll for the property for the last 2 yearsSecurity deposit registerPayroll recordsEach different lease typeWritten property policies such as pets and parkingInformation on all rent concessionsList of any uncompleted maintenance requestsMaintenance and capital improvement history for past 3 yearsLitigation history on the property for the past 5 yearsAny operation manuals for the propertyTitle policySite planArchitectural plansEnvironmental ReportsAny mold inspection reportsAny lead-based paint inspection reportsAny fire system reports or citations

I also called Shelter and their insurance was very affordable but they told me my rental had asbestos siding and rejected my application.

TLO you have to be a member pass application and site review.

That $3000 is not a "deposit" or "fee" for the loan.Probably the biggest misconception of DHM is that we charge an "upfront fee" If you have a property under contract you can fill out a loan application on our site and we can review it with you to see whether or not both parties feel like it is a deal worth pursuing.

And so, how could one create a tenant screening to vet out all the less than quality applicants?

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.