If not, what is the best way to present this to the seller so it addresses his concerns on how the adjustable rate is handled?

Present it as the win/win option. 

Make sure your advert and property is presented in a way that will appeal to your desired tenant3.

@Jon Taylor, the collaterol for the HELOC was the investment property sold 3 years ago (and 1031'd into 3 DSTs)...that's why I'm concerned it's probably not still available even though the bank is saying it is...I see @Dave Foster 's comment that the bank may not extend once they figure out it's an interest in an entity structure presently...so I am guessing I need to explain to the bank what happened and see what they say... 

Only info presented is that all properties are rented.I plan to ask for rent rolls, what else do I need to know (watch-out-for's) in this pursuit?

Sat in a room of 30 other investors when this 23 year old kid presents an 8 property 10 unit deal... gross cashflow of $4700 a month.

At closing, you will likely meet at your title company’s office and a title agent will be present.

@Rebecca ColemanSeller financing presents upsides and downsides to home buyers and sellers alike.

Attached is a slide presentation of the deal with cma.

@Aaron Mazzrillo  might not be BORN a salesmen but some folks simply have the innate gift that others do not have.Qualify present close  that's what its about AFTER you do the 3 M's  and having been around many many RE sales folks over the years.. you can just see some that are great at the game.. but many have such a hard time closing... can't ask for the order.that's a very good point about flipping.. however to flip usually takes some pretty decent capital to get started .. and whats happening these days is folks get the impression they can make substantial money wholesaling starting out with very small amount of money..