The standard items like loan amount, interest, timing, the property, late fees/penalties, etc.

@Steven Torok, 27.5 years is the standard IRS deprecation rate for residential real estate.   

My question regards how the lender is calculating income in the debt-to-income ratio based on the existence of the partnership.)If we treat the partnership as a standard business, our DTI is unfavorable:Net rental income: $7600Other income:        $3000Total:                   $10600Debt:                    $ 6000DTI: 57%A DTI of 57% is above their limit.However, since Net Rental Income excludes $1000 monthly depreciation (non-cash expense) and $2,400 interest expense (part of the proposed debt), we were initially told that they would add back depreciation and interest expense, leading to a monthly income of $14,000, and a debt-to-income ratio of 43%, and that DTI would pass muster.The loan went to underwriting on that basis, but underwriting decided that they couldn't add back depreciation and interest expense, since it's a K-1.

Anywhere from 70% to 85% (or a little more, even) using the standard wholesaler formula. 

I can't begin to figure out how people really make money long term on standard long term rentals up here.

Have multiple exit strategies (convert to standard rental, don't over leverage on the purchase, etc.)2.

Not sure about the standard returns in your market but to me that’s excellent.

I have a standard format one but it is not WA specific (got it for free after buying a Biggerpockets Audiobook).I was told that you cannot rent until you've lived in the home for up to 12 months.

Is this the standard way for finding the arv of a property in NY?

If a Turnkey is unwilling to operate under the same standards I would run the other way.