You could let her know that you are too small to make reasonable accomodation if the stairs become an issue, but probably not worth it.As far as rent to income ratio, this is something you should set before you start taking applications, then stick to your standards. 

Our screening process is quite thorough, though definitely not as much as yours.When we receive an inquiry, we state our qualification standards.

If the property has deferred maintenance and is not up to standards to be rented out, you won't be able to finance this on a DSCR loan.

On the flip side having 2 residences in one building does bring efficiencies from a management/ownership standpoint.Finally, the payment structure you mentioned (30-40% until project completion) is fairly standard for pre-construction properties.

@Sarah West The basic concept is that you take out a 1st position HELOC instead of a standard fixed rate 1st mortgage.

I know how stressful it can be with those gaps in monthly income.I personally use the standard Chicago Association of Realtors lease...do you have a copy of this by chance? 

I really like to keep a close watch on my investments and living within access to them is the best way to insure the property performs to my standards. 

To me the issue isn't charging fees and making profit as much as it is doing so without providing tangible value in returnA business exchange should result in value added not extracted—charging a 50% leasing fee to then only do remote showings, charging a $25/mo smart-home fee because of an added a $50 wifi-enabled thermostat My clients pay management fees as high as 20%, none lower than 13%, and in return they receive comprehensive property managementMy residents pay nothing other than rent, because they're not clientsI can't complain though, because if it weren't for the industry's standard practices becoming this way, I wouldn't have my niche

There was never a "standard" commission. 

I am in the Indianapolis market so it may be different, but we charge 18% and thats pretty standard.