I currently work with investors who are looking to invest SFH/LTR that are turn-key ready and manage for them on the back end, so I see a lot of benefits in that market across the board. 

i feel like the local FB groups will not allow me to advertise my STR there because they would label it as "soliciting".. any way to get around this so that it doesn't look like i'm soliciting? 

If so, is that recommended for a first-time buyer?  

Building on what's been said so far, STR is hard in Philly, and hard in general right now with the market and platform fees, etc.You owning the property and living in one of the units gives you both more flexibility and more oversight over the other 2 units to experiment.Assuming you've gone through the regulatory hurdles, you should rent one as a long-term rental. 

We decided to market it as a 4 bed/1 bath with an office.Listing Price - $199,900Property Taxes - $2,230.13AssumptionsPurchase Price $230,000In this case I had seen similar properties selling for $225K - $250K so I felt the property was listed low to drive up interest.

How do you prepare them to receive and manage that wealth so that they don't squander it and/or have it cause more harm than good?

@Albert Johnson a bank statement (can be altered), a bank letter with contact information is better so you can verify the information. 

Schools aren't as solid as gwinnett so tenants tend to be less sticky.From a duplex perspective - 2/1 units lease up very well in the outer markets like Cartersville, Douglasville, Newnan ect.

My dad was a contractor, so I've grown up building houses, remodeling, etc.

Leo  judicial states so they go through the court system, that is where you should check