The capital invested by the borrowers was in the form of either, or a combination of: (1) additional deposits into interest and/or renovation reserves; (2) the purchase of a new rate cap; (3) a principal paydown of the loan and (4) bringing any delinquent loans current by paying past due interest owed.

You will receive the security deposit in Checking but then transfer it to Savings.Savings: Hold the deposit here so it's separate from operating funds.

Are there escrow accounts to hold deposits? 

This is a general question for security deposit deductions made by a landlord of a complex.

Give them 24 hours to pay the security deposit and sign the lease.

The LLC also guaranteed a number of months rents and was going to hand me the substaintial non-refundable deposits from the tenant.Ultimately I decided not to pursue the property.

It does not provide banking accounts for deposits/and to keep units separate. 

Do you roll the deposit over for the tenant that renewed?

A double security deposit can. 

That being said, I read some (old) reviews that said payments had been hung up (withdrawn from the tenant but not deposited into the landlords bank account longer than 10 days) and customer support was ZERO and their 'ticket' program kept automatically closing out the ticket request without resolution.