Usually 30-80 investors show up.

Usually you can see permit applications, taxes, value, sales history, etc., but it won't show you property manager info or violations.

You will usually get what you need if you network there.

You'll hopefully never need the piece of paper, but just knowing (and remembering) what you agreed to is usually enough to keep things going on the right direction.

Yes, there will be tax benefits and certainly appreciation to some degree, but most often you'll be receiving negative cash flow every month in the meantime.

That's the concern when it comes to associations - not necessarily the threat of special assessment but how you got to the point of special assessment is usually more telling. 

They were then able to put term debt on the property, usually at 75% of value, allowing them to complete the BRRR strategy.  

That's why they're usually for sale.Lastly, as @Frank Rolfe so aptly stated "If the comparable rents show a market of, say, $300 per month, then you might well be able to raise the rent significantly enough to come closer to his price". 

I usually buy stuff that needs very little work "Wholetail" type deals and also Sub-2 deals.  

(Investors usually buy duplexes for monthly cash flow which is small.