If I was going to do it again I'd take rough measurements of the rooms and take pictures to get budgetary quotes from contractors.  

It is referred to as Cash-on-Cash which means all you are measuring is how much your down payment is earning for you.

Mass foreclose did not work out well last time they will not let that happen again.After the world is open for business again, I see the economy starting to recover at a measured pace. 

Likewise, many employees that used to be tied to an office and as such aimed to live within a certain commute are now being told they can work remotely either indefinitely or at least through year's end. 

Masks are a preventative measure designed to keep others safe from your germs.

I remember someone saying on one of the BP podcasts to bring a tape measure to get your own measurements, any other tips like that?

Our aim is to maintain positive CF (even the CoC number is crap initially) just to "cover".

I am open to hear about slightly more expensive markers as well but that's the range I'm aiming for.I am hoping to buy my first property in about a year so I am looking for a market that will be relevant for the next 4-6 years.

@Mark Vivanco that PM you talked with sound's like he's aiming to steer you to the highest gross rent meaning the highest fee for him.

The big jump from interior-only to addition is the need to measure and model the exterior of the house.