I use facebook, Google search, and sometimes even LinkedIn to gain more information on an applicant.

However, this option shall not be exercised by Lender if such exercise is prohibited by Applicable Law.If Lender exercises this option, Lender shall give Borrower notice of acceleration.

For collecting rent/applications use COZY it's free and an awesome service.

Am I misunderstanding the 50% rule and the application of the $200/unit cashflow rules of thumb?

The professional company will come in- tape everything off and put plastic sheets all over the bathroom.

I would come up with some form of qualification, an application process for this that actually more so works to quallefy them for the market rates. 

Tell them what they need to supply, and if they do not, move on to another applicant.

I have three applicants, all are currently roommates.

You may have to consider a creative strategy to get them out like a pay to leave situation if they resist: offer to pay for the moving truck or application fee for the next place or even give them the last month for free...anything to get them out and get your unit up to market value so you can maximize your cash flow.A few points to note before you take action - be sure your area doesn't have any rent controls or laws restricting landlords from raising rent. 

The percentages are based on the number of financed properties:• 2% of the aggregate UPB if the borrower has one to four financed properties,• 4% of the aggregate UPB if the borrower has five to six financed properties, or• 6% of the aggregate UPB if the borrower has seven to ten financed properties (DU only).The aggregate UPB calculation does not include the mortgages and HELOCs that are on• the subject property,• the borrower’s principal residence,• properties that are sold or pending sale, and• accounts that will be paid by closing (or omitted in DU on the online loan application).