Sounds like the person knew what was going on with their credit report as they have filed reports in the past. 

She'd probably be able to put you on the line as a co-borrower.I've done this personally and it's been great for me and my situation!

Used houses in the area sell anywhere from $75-125 a square foot.These are long term rentals that I do not plan to sell.I am reading the Rental Property Investing book and implementing the method that focuses on cash flow and that strategy states you need to have $300 cash flow per month, per property.

Have the tenants take and send pictures of any maintenance items and video chat with the repair person as needed.If you ever get in a situation where you just feel like you can't do it or don't want to do it, you can always put a PM in place at any time. 

Is 10-15 miles too big of an area when determining the unit count per person?

I flew in town, ended up setting it up - they finally hired a task rabbit person, as their team would just deliver a box and leave.

If you have the time to devote to it, direct to seller methods can be very effective, but will take ultra-patience and intensive work. 

This means, on average, that this person is facing foreclosure or bankruptcy, and has no other reasonable options.

Personally when buying rentals I tend to buy in neighborhoods that I feel like I wouldn't personally mind living in and when I look for tenants I try to look for people that not only pass my screening but also I personally don't dislike.  

DSCR will help if you are tapped out of conventional loans and you don't qualify for a traditional loan based on your personal DTI.