What matters more is whether the borrower in question has the (i) time, (ii) contacts, (iii) experience, and (iv) ability to effectively communicate & package their loan request to banks & credit unions in a way that is compelling to those lenders. 

I was mainly thinking about the effects of putting an entire strong cashflow back into the mortgage.

One of the lease for a rental is about to expire and would like to change from single family to rent by the room and try, to market for regular leasing we normally go to Zillow and advertise for free, but for rent by the room not sure which of all the sites out there will be the best option(s), some of them are for free, majority pay a monthly or anual subscription ($99 to $200).Do you have any guidance on which to select?

Tons of jobs and growth which allow for better tenant selection, low crime/safe, etc.

You will have to do something unique to make it effective & useful to you... because it's always no pain, no gain!

How do I design a small yet effective real estate portfolio?

It seems like a more cost effective way to have multiple tenants. 

Need to be able to view, edit, and save changes.Unit / Lease Abstract View: Customizable view that allows user to select a given property and provides a menu for that property of all tenants/units at that property.

The irony of the 1% "rule" is that those who could even use it effectively don't need it, ie if you need to spend more than 30 seconds thinking about whether it fits the guidelines you're probably not educated enough in RE to use it anyway. 

You have to keep in mind that a plex will never be valued the same as an SFH, and renovations may not have the same effect on the value as an SFH.If renovations are not needed right now, I would work toward getting the rent to market for the as-is condition and then renovate each side when you have turnover.