I know many are going to ask but the sale of his previous companies are still tied up in the sale agreement for him to invest in the company he sold to.

California is most definitely a Tax-deed sale state. 

How can I find a list of homes that are not currently for sale but that may have an ADU, so that I can start to reach out to these owners about any potential interest in selling?

A project will have a life cycle that spans close (purchase of distressed) to close (sale or refi at new value). 

I was wondering the same thing.  

The idea that you can build wealth without putting any money into it is a recipe for disaster and the sales pitch of gurus trying to steal your money.

As responsible Real Estate Investors,  we want to educate them on their options:  Mortgage relief programs, loan modifications, forbearance, short sale, etc. 

Many for-sale by owners aren't aware they are legally obligated to disclose.

Can my sister and I donate land my deceased parents received deeds through in tax sales? 

Jack Bosch and a lot of the land flipper guys who teach it like to have their students buying in the high deserts and remote areas of the Western US  or in FLA like le High Acres etc. this is were cheap land is and land that gets traded constantly at tax sales.. the play for most of them is really simple.buy at tax sale or with direct mail.. for a few grand  re-market them for more and sell on terms and collect monthly payments..