If it's possible, change the driveway configuration so that it's no longer shared. 

Or am I overthinking it and the size of the land and property is a good deal at this price regardless of the remoteness of the area and odd communal configuration?

My question though... is it beneficial to replace it with a better door (for future re-configuration flexibility), or to just permanently seal it off? 

It is configured for 4 tenants.

The window may be more expensive, but framing and re configuring to two smaller windows likely doesn't save anything at the end since you have more materials to buy and finish the exterior etc. 

The self-directed configuration just gives you more choices.  

Conversely, because real estate is almost limitless in business model configurations (i.e all the examples you gave and more!)

Also I would be learning my market to see what’s out there and what different price points and house configurations would require. 

Purchase price: $147,000Closing costs: $6,000Improvements costs: $7,500LOAN: 0% down, 5.5% fixed for 30 years (No PMI)PITI: $1280RENTAL ESTIMATE: $1525-$1600RENTAL MARKET IN LOCATION (Southeast Texas): scorching hot in demand for SFH rentalsARV: $179,000-$187,500Total cash out of pocket: - approximately $13,000Given the numbers above, do you believe the cashflow is sufficient enough for this to be a solid investment, or given the high PITI and questionable real estate market's future, would it be best to take advantage of the current market configuration and sell for an easy $25k profit? 

This was how the home was configured when I purchased it.   4.