Given this is first investment, I would like to keep it local.Any suggestions on neighborhood with good rental cash flow in Middlesex county ?

Any suggestions are greatly appreciated.

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

DSCR loans carry Prepayment Penalties, so unless you are comfortable staying in a 9%+ rate for 5 years, I would suggest just going with a normal 20% down DSCR. 

Once the cost segregation study is complete, will I be able to take a full year of depreciation or only a prorated 4 months? 

I would suggest research areas in Alabama that you'd like to invest in. 

Programs that market themselves as shortcuts often cannot replace the depth of understanding that comes from study, experience, and engagement with the legal framework surrounding real estate.Consider taking time to familiarize yourself with local laws and regulations.

Any suggestions I should consider before engaging them?

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

This is very different than other markets where the majority of homes were built after 1960.So, I suggest first learning your market.