Is anyone able to recommend a good real estate meet up or REI group that covers the South Bay & West LA areas now that in person events are starting up again? 

Those buyers, unless they have a life event such as death, divorce, illness, won't typically be forced to sell and therefore won't be selling for pennies on the dollar.

Nothing I saw in the management agreement or lease about the order in which the SD is applied in the event of eviction.

If this occurs when using a private lender, what's the best approach for this situation?

You could cold call direct to seller, find a deal, and then go to a local meet up event, and network to find a potential partner.

In the event of a big money suit that draws your insurance company in, think about how not re-keying gives your insurance an argument to not pay due to your lack of diligence in cutting off one option of potential harm to your tenant over which you have complete control. 

It occurs every two weeks in Springfield.

Normally if the sale is conditional on the tenant moving out, then I wouldn't recommend actually closing on the property until that step occurs, however it appears from your post you have already closed on the property so that's not helpful advice at this point. 

If you see some big CapEx events coming up, then it often times makes sense to lock in your gains by selling now and letting the retail buyer take on those CapEx projects as part of the joys of home ownership. 

In any event I would raise the 660 to 700 and raise again in the new year.