We are considering building and holding townhomes but need to determine the costs.  

Quote from @Atif Khan: Hi, new here. i just finished building my first spec homes out in granbury tx and was looking to buy a few more lots around dfw metroplex.

On the topic of building inspectors, make them your best friend.

Good luck with the team-building :) that is the most important phase, without which, growth and scalability will be hard to achieve!

You have to find a zip code that has a prevalence of multifamily and a pathway to build multifamily.

So when you build your pocket neighborhood, which is an interesting concept, what's to stop an undesirable person from moving in.

Quote from @Matt McNabb: I'm a solid $400k/yr job in NYC and have $250k to begin investing as my first step into building a portfolio, although I don't have time to be a landlord so I have to account for management fees.  

I have been told by a contractor that the foundation of the building is intact, so it does not need to be torn down but requires a "gut renovation down to the studs."

Do you know how I should go about to find  a trustworthy and fair GC for ADU build in North Hollywood? 

Building an ADU is not like building a structure on a vacant lot.