I just want to know if they're a legitimate business and I won't be the victim of identity theft or the like.

However, there are plenty of similar quadplexes to this one, in fact, on the street that this one is on, there are a whole bunch of them that look pretty much identical.

During the reservation process, identity and credit cards are captured, The same way the host gets reviews, so do prospective guests which helps with screening, so although not impossible, I don’t see it as highly likely for the AirBnB to be used as a party house.

It also pisses some people off when they learn that some cases of "identity theft" are actually identity confusion on the part of the credit bureaus.Debt Strategies addresses Debt Acceleration, Debt "Snowball"-ing (something promoted by Dave Ramsey and approved by the JD/CPA you saw in that presentation, Mark Kohler) and Debt Reduction (without bankruptcy).

Side by side, identical duplexes.  

What some others have said echos this impression of mine:Chris Clothier:“Roofstock wants to give the impression that they have handled everything for you and they are the experts.”A screenshot from a private message sent to me (identity concealed): Another screenshot from another investor's (let's call him/her Anonymous2) private message:What Anonymous2 wrote at the end of this screenshot reminds me of @Tony Kim 's comment that Roofstock isn't ideal for investors who want to play a very passive role in the purchase. 

Both houses are technically identical, and the allowance is there.

What I meant was assuming tenants are comparing more than one place, this is what they find. 2 identical properties.

 I thought I would reopen this since I have an almost identical situation.1.  

Don't assume that all auction companies operate identically.