This generated $2M+ in equity, and thus is highly lucrative, but takes 2-3 years.Note worthy: I am located in California, but I did this project in Canada.

It's well known that banks do not loan their money, nor are they allowed to loan credit, so who is funding this type of transaction is my question, because something else has to be taking place, otherwise the only logical answer would be cringe worthy. 

Our net worth is 4mil so our CPA asked us to move them in LLCs last year.

However, while you will save in money, you will have to then use your time to oversee the management.You would then have to see if the fees you are paying are less than what your time is worth.  I

Anyone find this a worthy business venture? 

There are many more experienced investors on BP than me (like yourself), and I'm always looking to learn:"What makes you think I'm experienced and "worthy" of offering advice?

As a result I must Study the market and know what i’m worth. I

The only problem then is them finding a man that is worthy of them when they get older.  

I've also tried Yelp and just Google but haven't found anyone that seems trust worthy.

It’s still a worthy strategy to force cash flow that’s rare to find in SoCal, especially if you can reduce the cost of construction by doing a conversion/using an ADU grant or even buying a property with an existing ADU In general, even if the ADU valuation matches your cost including grants, they are usually not worth it in southern CA in single family zones.