Confused by rent roll/ pnl

[Jessica Costa]

I was given the below rent roll / pnl spreadsheet from a broker who has an investor who is looking to sell two multifamily properties. 

I am a little confused by the proposed financing section - are they proposing seller financing? It lists the line of credit, are they referring to a heloc on the property? And if so, how does that work in this situation? 

Any insight would be great, thank you!