Start an account with a brokerage and start trading to gain experience.

I stumbled upon bigger pockets while surfing the internet.I am a union construction working currently at the world trade center.from what I have read real estate investing seems very promising.here is my situation I am currently renting an apartment for 1400 a month.I am married with two children.now I am confused on how to start out on this adventure.I have $70,000 in savings and good credit.should I obtain a multifamily home  with the objective of having a tenant pay off the house I would live in,or do I stay in my apartment while seeking out an investment to purchase and possibly fix for rental income .how should I start

You should find out what class C properties trade for in your market and try to buy at that cap rate or better.

A GC's job is scheduling materials,trades and inspections with the local municipality.Most of the work is done on the phone literally.

Joel makes a good point regarding the land vs. house value trade-off.

One day, my body and looks will fade, which rules out the most consistent (relatively speaking) of those three trades. 

I'm actually in the trades so I have no formal knowledge of finance.

Or do I start remotely building a bit more of a network and knowledge base in PA, trading the difficulties of sourcing for the greater likelihood of future footprint and leverage?

Will you have money in the game as well and are you licensed, bonded and insured for the trades you will be acting as in the process?

Some may be using that money to acquire but there are people like me that trade smaller monthly cash flow for large chunks of immediate cash.