Also in terms of multi-unit brokerage companies I recommend Essex...

They do offer access to conventional financial products, but is it a bit cumbersome.With a checkbook IRA LLC or Solo 401(k), you can easily establish a brokerage trading account within your plan, and therefore easily reallocate between conventional and non-traditional assets pretty much at will.

I do already have a brokerage that I'm fairly certain I want to work for, but any other tips would be highly appreciated.

Not to far from me there is a small brokerage that is owned by a husband and wife investment team.

No we have our own brokerage company.

Can anyone recommend a low cost brokerage in Massachusetts where he can renew his license and maintain MLS access?

I think what you are looking for is a 100% Brokerage. 

I have looked on Costar for individuals who have done 1031 Exchanges, peeped at alternative websites who act as either a brokerage or glorified listing service, called into my local networks, sifted through hedge fund managers, etc.  

Hey Marcel Acero I’m an agent at one of the top multifamily brokerages in the state and can help you out.

I have been referring these deals to my brokerages commercial agent.