I see it that your first decision is; to scale (grow), to coast (doesn't sound of interest or else you wouldn't be asking these questions, right), to exit (cash-out) or to transfer. 

Promissory notes are transferred by endorsing the back or a document called an allonge.

Check for transfer costs before doing so. 

Most people will get the loan in their name first, and then transfer it into the LLC after.

However, everyone involved would need to meet the IRS requirements for a 1031 exchange.Finally, regarding transferring an individual property from the partnership to a member directly, this could be tricky.

Another option is to put 2-3 inches of spray foam insulation then batt under that, it will assist with stopping some of the air transfer and seal it off as well.I would also check the windows in those rooms and whcih way do they face.

Oh bud, I think it would do that we’re gonna need lender’s consent as well and that’s what I’m trying to prevent, but maybe they do it under them handle that part and then after the fact transfer it. 

If can't transfer the rental into LLC and there are compliance costs associated with maintaining it you might consider shutting it down.

Please consider putting all of your information together in writing with dates, every name you can remember, wire transfer confirmations, what they promised you, what really happened, etc.

Unlike our real estate investment, there weren’t hefty transfer fees involved in either the purchase or sale.