They can use a little more common sense in these types of situations (your education level, your track record, your income, etc) and lend on that basis.

Single-hung usually next in line, then double-hung... casement/awning windows of comparable size are usually the most costly of the common window types.Be sure to pay attention to the egress needs - while a 2650 DH might meet egress, a 2650 casement may not (or it may need side pivot hardware).I could write a small novel on what to look for when buying windows... however, sleep beckons.

Daughter-in-law had right of survivor ship as we're tenants in common.

If you don't own your current residence but are paying more than 100-150/mo then my common sense says you're winning.

It is not common in the United States.  

Probably a dictation error, but is there an InspectorGeek?

@Joe Fornasiero cleared up my error above:  I was under the impression that student loan interest was not tax deductible (the same as here).  

EFFECTIVE GROSS INCOME: $89,330EXPENSES:Property Management: 7.5% = $6,700Insurance: $5,112Maintenance: 12% = $10,720 (I will likely modify this number after inspection one I have a better idea of the actual shape of the property)Taxes: $8,568Trash: $1,085Water/Sewer/Common Elect: $6,910TOTAL EXPENSES: $39,094NOI: $50,236Cap Rate: 8.37%Debt Service: $33,672 (5 yr arm - 25 year am, 5.0%)Net Cash Flow Before Taxes: $16,564Cash on Cash (Assuming 20% down): 13.8%ROE (NCF + Princip paydown): 22.1%DCR: 1.49Debt Yield: 10.5%Using 50% Rule: $83.28/unit/month

Those are all fairly common ideas I think. 

Typically wholesale deals that make good rentals, will have a higher percentage (approaching 80%). 77% to 80% is commonly seen from the "big box" wholesalers in town for their rental inventory.