- What are average rents for a property in similar condition with the same bedrooms and bathrooms in that area? 

If its a business expense, and the business is registered here in the US, it maybe able to work.

One thing we have noted as troublesome for some potential househackers with this conventional program is that in order to use rental income from the other units towards qualifying you need to have some current housing expense verified (rent, a mortgage, etc.) 

Good work is expensive but cheap work will cost you a fortune.

Average comps of sound 3 bed 2 bath homes sit in the 250,000/300,00 range in my area. 

Zillow showed in a recent survey an average of a 4.1% home value increase across the Country by going solar.

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 = 1.23DSCR lenders generally let you vest either individually or as an LLC.

That could be expensive , if you are tying in to natural gas at the street , 5 grand and up . more if they have to cross the road . 

If they use hard money lenders those loans are EXPENSIVE loans because they are short term loans with no early payment penalties and they will also finance rehabs.

I think the rent would make a good dent in your mortgage payment but you would still be paying some money out of pocket after all expenses.