Two things:First, it would be the ruin of a perfectly good country.  

If i sell my SFR rental for $450k and equity is, for example, $200k...Can i invest 100k into a new SFR worth $275k and invest the remaining 100k into a sponsored DST or TIC (which deals are usually multiple hundreds of thousands of dollars?

Also, what if you spend thousands of dollars on a brand-new DADU, only to have the seller reaqcuire the house?

I’m aware that thousands of notes with their corresponding Mortgages/DOT’s are packaged up and as a whole create an MBS (mortgage backed security).

I haven't bought anything in over 3 years--instead I've been watching the multifamily market implode mostly from the sidelines, except for the thousand or so units that I still have. 

Some of those facebook groups have thousands of members.

Here's a chart from ShowMojo based upon the thousands of properties their clients use their system for:Not sure how any landlord or PMC doesn't understand that DOM are affected by the time of year and it's taking longer to find tenants than any time since 2018!

I also don’t know how many thousands of members and opinions are on BP.

Right after I closed on that one the insurance company demanded I make a couple thousand dollars of repairs.

For example, to get up-to-date property tax data you would need to scrape every county's tax data website (thousands of different websites, data formats, issues, etc...) then aggregate and clean the data.