I purchased rentals that are all clean BRRRRs and meet the 1% rule then grew my portfolio to over seven figures.

Seem super clean as far as expectations go.Definitely smart of you to not interrupt the other tenants power that would only create more issues.  

Add charges for rent for the remaining months, estimated utilities, estimated cleaning and repairs and cost to re-rent (in our case: cost to PM is 1/2 a month's rent).

It looks like your seller wants to seller finance the deal to 'be the bank' - which can be great - maybe you can negotiate a better deal on interest rates than what is currently going on in the regular market - which would be awesome.As for which home first - I would definitely go for the duplex you are already in.  

The tank had to be inspected and cleaned as oil dries in an empty tank and clog the pipes and furnace.We had the tank auto refilled, the oil company sends me the bill, and I in turn bill the tenant.

Junked it out, cleaned up landscaping, drywall repair, texture, paint, new interior doors and trim, new waterheater, new floors in kitchen. some new floors, countertops, new roof, painting cabinets.

They’d hire someone to clean and paint, and put the house back on the market at a slightly below retail price.  

I invest regularly in Worcester, Providence, and towns outside of Worcester. 

Banks do this regularly during any kind of financial hiccup.  

That will help keep thing square with the guests.Remember that you need to do a full background check etc etc with a regular full lease for the time they are there.