Any account in which you receive tax benefits like 401k, Roth/traditional IRA, HSAs, 529s, etc. 

Can I pull money out of a property that is in a self directed IRA?

So I go from $400 to $700 month extra to save for other investments, or add to an IRA, or spend, etc. 

My kids meet once or twice a year with their financial manager and he discusses how their Roth IRAs are doing and also they listen in and ask questions about how a family trust is managed, goals for the future, returns from the past.

A lot of forum members are very knowledgeable in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, rentals, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.Discounts on some products and services are offered to BP members: https://www.biggerpockets.com/perks/proThe site has quite a few tools that can be helpful for new members.

Is the money left in the solo trust has to be rolled to an self directed IRA or similar since the sponsored plan no longer exist?  

A lot of forum members are very knowledgeable in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, rentals, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.The site has quite a few tools that can be helpful for new members.

What's the best way to use money in my 401k/IRA for flipping?

He has a traditional IRA.

I’m a new investor who just opened an self directed IRA.