If you don't, is that something you would recommend doing or not?  

Any recommendations for cold calling lists for either Wholesaling, or retail selling ( I am a realtor / flipper / associate architect).

Each person can provide a recommendation for the appraiser and the other party agreeIf you cannot agree on an appraiser then you sure as you know what will never come to an agreement on the price.Another option is to list it and you have ROFR

Thanks for sharing Brian!

I recommend. 

will let you know Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

I would highly recommend them. 

In any case I'm looking for a recommendation of an attorney that specializes or has experience with tenant/landlord laws in PA.

if you buy a property at market price in a good neighborhood - you will break even or lose money.and in general, if you're serious about this, i'd recommend going to your chosen market in person, probably multiple times, to set up your team. 

Your operation, which earns commissions from marketing and recommending investments, is not a club.