At the last minute I got cold feet and did a 20 year mortgage, not a 15, so I had to make a backup plan to pay the $45K as the mortgage would not be small enough to pay off with a refi if there was no increase in value. 

For something like that, I would assume that the extra space would cost about the same as new construction (on a per-square-foot basis). 

Number of  square feet? 

What price per square foot?

Any ideas on how to get more details on the properties sold such as beds/baths, square feet etc.

I am just starting to get my feet wet in the commercial complex world.

I think transportation and jobs are the big drivers for rentals.Some features like land and above average square footage seem to do little to increase rental rates.  

Out of interest any sellers get cold feet between signing the LOI and going to title company.Maybe it's the miser in me but for a licensed agent/broker to agree to this setup wouldn't they want a lot for doing it?

I intend to jump in with both feet and buy a rehab in April or May of this year ('15)I look forward to connecting with the Bigger Pockets community.

I can see a developer building a new homes with equal or greater square footage and charging less as prices move up.