As many as you can afford.

By making it an affordable Meetup group (without Guru’s involved), It could potentially gain huge popularity.

Further, auction buyers as a real property owner have a statutory right of notice to a senior's foreclosure, which starts the clock of redemption that must be afforded or that owner can contest the foreclosure all together.  

It's been a frustrating process with the agent who didn't honor our deadline for a response (which was the first by many days) but waited for more offers and then did a multiple counter offer, meaning they countered several offers.  

As a hands on individual who lives at the outer edge of a major metropolitan area, I'm curious if investors from the "big city" who are looking for more affordable markets would find benefit in the assistance of a fellow investor native to the area (to help vet properties and/or act as a property manager).  

Now mostly newer homes in a much more affordable price range than what you can get closer to the Bay Area.  

BP posts can be frustrating because the relevant info is often left out.  

I am sorry to hear of your frustrations, and the end outcome of your hard work.

Find their motivation for selling (they're very frustrated at this point), and then use that in your offer/negotiations as well.

This helps explain why most of the examples where I've seen this done are done with some sort of affordable component that includes low income housing tax credits or they're done in luxury areas where the rents justify the conversion costs.