What would be the best advise, particularly for those in NYC as wholesalers, to get the ball rolling and get a head start in my investing journey. 

The temperature is 80 degrees in their house? 

You don't have a crystal ball and don't know what the market will do in your area. 

We all feel the appraiser is low balling the house and missed newer comps.

Simply take a ball of damp soil in your hands from your proposed parcel and see how it crumbles.

I think if you are going to college it would be very beneficial to house hack to get the ball rolling and then dabble in wholesaling or become a realtor.

we are looking at doing a complete demo ... all walls, floors, appliances, everything.it is 750 sqr feet    (small)   bottom floor is living room, dining room, kitchen..   2nd floor is 2 small bedrooms.any ball parks for what a demo job should cost?

There's nothing quite like a judgement to get delusional tenants to understand that "it's not their ball, not their court." 

I like the idea of owner financing, but just don't know what to ask for as far as interest rate, amortization, down payment...Just spit-balling, I was thinking something in the neighborhood of:20% down8% amortized over 30 yearsBalloon in 5 to 10 yearsBut that's an absolute shot in the dark.

Leave the ball in his court and move on.