Are there specific databases or resources that are invaluable for this research?

After the fact I tried to search the national Pacer bankruptcy database, but could find no mention of the property's owner.

The lending environment may very well have changed by then and instead of a vision you will have execution when you try to get traditional funding.If you have your database from when it was operating, start there. 

My wife and I use it in our 14 apartments and build our data base like crazy.

It's highly unlikely though, that a Class A tenant will settle for a Class C property in a Class C neighborhood.It'd be interesting to put together a data-based matrix on these 3 variables to support the above opinions:)

I'm in Los Angeles.What I'm curious about is if you have a strategy to get bookings from the companies, beyond them finding your listing somewhere and adding your property to their databases. 

I have a database with over 1,000 lenders who are legit.

I believe it was made clear initially this was exempt, open to accredited investors only, etc:If you have searched the SEC Edgar database for an apartment LLC syndication and the syndicator, and you cannot find them listed, it could mean several things:Exemption from SEC Registration: Many real estate syndications, particularly those involving apartments, may be exempt from registration with the Securities and Exchange Commission (SEC) under Regulation D of the Securities Act of 1933.

But that comes at a $7k cost for their database and software, if you are hands on.

I keep a database of and run SQL queries that prove this..