Hey BP, need some guidance

We are currently in negotiations on an 11 property portfolio (have been for over a month and a half). 

 Purchase price: $625,000

Owner financing: $385,000 (3-year balloon)

Private investor providing remaining: $240,000 (5-year balloon)

 All terms are agreed upon except for one caveat: my investors are asking for the purchase to be 11 different notes and the seller is only wanting it to be one note. We already agreed upon 11 different contracts and 11 different deeds. 

My question is: what are the pros and cons on 1 note versus 11 notes, and is there a good solution to satisfy both parties? My investors would like 11 for protection (in the event of default - as well, it would help in case I would like to sell an individual property). I know it would cost me more money at closing, but shouldn’t affect the seller, correct?

Is there a downside for the seller if it is 11 notes?

Trying to come to an agreement - I believe this is a deal breaker for my investors if it does not happen, so interested in hearing any thoughts/advice.

Thanks