People house hacking have far different expectations than someone buying properties with cash. 

If you're purchasing a single family home you can use traditional financing like you probably did on your house or you can do a commercial loan.

Good on your friend for suggesting house hacking a duplex.

I’m starting off wanting to get into a primary residence that I plan to house hack and then figure out the next move into investment properties but that’s down the roadwith all that said, are there other ways that im not thinking of to 1.

Would add Sub 2 & Out of State House Flips. 

Focus on analyzing properties and starting small, like house hacking or buying a single-family home to rent out rooms, while ensuring cash flow and maintaining an emergency fund.

If I owe $350k mortgage and I take out $100,000 HELOC and spend it on say a 6 month CD,And then I sell the house for $700kI would only have $250k profit right?

The houses are just a commodity. 

In short, I can afford the additional $1100/mo cost of a second house, even until I rent it out.I have around $35K in HYSA and emergency funds that I could use for a down payment, but that's less than 20% which would be required for a conventional loan, assuming full purchase price.

It is a corporate housing arbitrage mentoring program.I'm about to sign up but wanted to do my due diligence I want to check with people here if this is legit and if the program is worth the money they as asking for.