I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23If a purchase, you also generally need reserves / savings to show you have 3-6 month payments of PITIA (principal / interest (mortgage payment), property taxes and insurance and HOA (if applicable).

I can't speak to the Denver market since I'm in DFW, and obviously can't speak to the specifics of your building since there are so many varying factors. 

I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23If a purchase, you also generally need reserves / savings to show you have 3-6 month payments of PITIA (principal / interest (mortgage payment), property taxes and insurance and HOA (if applicable).

That depends on how many units are in your MF, what your longer term goals are and what kind of lifestyle you want.If there are a lot of units or you plan to have a lot of units in the future then invest in setting up good systems now.

They will evaluate critical factors like land grades, water and sewer systems, and overall feasibility.

If the only difference between a co-signer and an applicant is a second job or some other insignificant factor, they are NOT co-signer material.

I will look at a few factors, rent for area, total mortgage payment with property taxes( which can be crazy in Detroit), investment in neighborhood, I like looking into places where they are building homes and apartments that attract young professionals or families , and also looking at potential to make a single family home into a duplex or something can add an adu or transform a basement to a studio apartment!

Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.

Yes, it may go by the income approach but depending on your area, the comp approach may also be factored in. 

It’s all about balance and what works best for you and your fiancé's lifestyle.