Help with 16 units and Wrap Around Mortgage

[David Roque]

I seeking to acquire a 16 unit apartment complex.  The seller is willing to do a Wrap Around Mortgage.  Knowing that this can trigger due on sale, would it still be advisable to the the Wrap?  I plan on rehabbing the property and refi within a year.  

The property is held in a living trust, could I add my LLC as a beneficiary to the trust as to not trigger due on sale?

Property is in CA, I have an agent but would I need an attorney to review the transaction?