I highly recommend starting with the beginner's guide and the podcasts but that's what got me into the real estate game, so I am a bit biased.

He isnt in the Philadelphia area, but I would recommend @Brandon Hall a CPA based in DC

first of all - congrats that you are actively looking and ready to pull the trigger on your first RE investment.I didnt see what the end game is?

If he brought the house to your attention, then maybe it makes sense to pass.But if it was a house that you had been watching its fair game and you need to go after it.

I am a newbie to philly sheriff's tax sale , and kept asking this question to everybody to make sure i have the right clear answer , even at the sheriff's sale i asked one of the shirreffs, but was not quite sureDo i have to run a title search for any property i am interested in at Tax foreclosure sale , or also search it at the city hall records for any other mechanical liens , utility bills , etc... or i do get the tax deed free and clear as some of them said ??

The fact that the property is being flipped frequently gets caught late in the game by the lender (frequently in a quality control audit just before going to documents) which can burn a lot of you valuable time available under your purchase contract. 

Hello all, I have a SFR that i have about 50k equity in, I have a 15year note, payments are 995 and it rents for 1250 a month, Im thinking about selling next summer, my question is should I sell this property and invest the funds into a 4 plex or multi-family units or should i jump into the buy and flip game?  

Should I contribute some capital to have "skin in the game"?

I think that you have a pretty good game plan in order.

The sellers are selling their homes for full market value (no realtor commisions), and enjoying fair market rents from a lease option buyer who's been talking to a mortgage broker from day 1 (and has a little bit of nonrefundable skin in the game).