With time, I will be needing a property manager to work with multiple properties (if all goes well).I hope I'm kinda on the right track, and am looking in the central NJ area for opportunities!

Also, it doesn't have central air, my thought is adding central air is a must for a flip.

working on a 3/1 ranch (900 sq ft) and getting estimates to add an electric heat pump (in attic) and an outside air handler. replacing baseboard heat. It will require all new electric from panel, insulated duct runs,...

The tenant is responsible for keeping the central air conditioning on to avoid any mold problems.

I have to reach out to some investors in central/north Jersey.

Try some reading:http://www.biggerpockets.com/forums/20/topics/16607-who-has-purchased-a-tax-sale-property-http://www.biggerpockets.com/forums/20/topics/19391-texas-tax-saleshttp://www.biggerpockets.com/forums/70/topics/46761-if-tax-sale-parcel-is-in-bank-foreclosure-http://www.biggerpockets.com/forums/55/topics/52907-young-central-texas-investor-tax-sales-and-trustee-sales

I use google voice and ring central.

If that's not for you, try a phone service like Ring Central, where you can have the number forwarded to you as you choose and thus take calls directly - and go to VM otherwise.

I had looked into several property managers in the DC Metro area, upstate NY, and south-central PA and the average was 8-9% of collected rent.

If the property is listed as having a "Central AC" but it doesn't, guess who is on the hook for providing a "Central AC" during escrow.