Need a broker to help with building a multi-family complex in Brentwood, CA area

[Prithvi Sri]

I have several investment properties in Brentwood, CA. I have a strong line of credit that gives me access to money that I can use to build a 20+ unit multi-family complex without having to worry about financing. I am looking for a broker/advisor who can help me (i) find a suitable land parcel and (ii) guide me with permits, etc and (iii) have prior experience of connecting with sub-contractors/contractors. 

Do you think there will be a broker who will help me with all these services or should I be hiring different individuals for each of the services? I have not done any development in the past, but I am interested to do it. I want to progress from simply being a landlord to single family homes. And I think there is a lot of value to be created if we build new construction instead of just taking over existing properties.