Acquisition in Maine. Leverage question

[Burton Boone III]

My wife and I own four units and we’re making the jump to double digits. Do you take out a second mortgage on an Airbnb that you never wish to sell that’s almost paid off  or do you take out 100 grand against your primary residence.  

We are getting 250 grand against our multifamily. Cannot touch that one because it’s super low rate of 2%. 

Our Hard Money lender will cross collateralize at 10% down and the other 10% equities in our properties. 

The rate on our primary residence sucks already  so in the years to come, hopefully it’s cheaper. We own 2.2MM in RE and 1.1MM in notes. All of our properties are appreciating and doubling every 3-5 years. So it’s hard to let them go. 

I have 250 grand equity(80%) lake property with a $65,000 note. Bank came back and said we maxed out our DTI so they only give us 115 grand and not the whole 250g. I don't want to underutilize the equity on this property so I feel like taking out 100 grand on our Primary where the rates suck already and it will only cost me an extra 600 or 700 bucks a month.

I’m new to this app and using it so please be patient. 
Two family note 403 at 2% valued at 800. 250 heloc coming. Gross 6000 month

Lake cottage 1 note of at 65 5%. Valued at 375. gross 52k

Lake cottage 2 note of 165 at 3% gross 48k

Primary. Owe 560 7.5% valued at 825. 

Don’t wish to sell anything because the appreciation in our state and vicinity to Boston is wild and keeps going up. 

Proposed property were paying 60 grand to unit utilities are paid by landlord  I’m hoping in a year this will net me $6000 a month

Was using voice to text sorry if there’s any grammatical errors.