Am I correct in my understanding that after the house is built and a CO is issued, we can work with a traditional bank/lender to get the new home appraised and take out a traditional mortgage on the home for XX amount (the amount owed to HELOC and hard money lender)? 

I am moving into this direction rather than investing for two hundred bucks per month somewhere in Indianaville.d) My stress is even negative now since I'm moving to new 'mansion' for househack, I'm literally mortgage free LOLI guess we can redirect our hobby in real estate into better health as well.

HI Candi.I am not a CPA, I am an investor myself and mortgage broker that focuses on helping with investor on expanding their portfolio in real estate.

Then, if you want to get into flips in the future, you'll be locked and loaded.I find wholesaling a rather dark practice and of questionable ethics, mainly because most wholesalers don't properly disclose what they are in fact, doing. 

I am wanting to buy out my car lease but am wondering how this will affect getting a mortgage.

You should know the contracts and the closing process, construction costs and all the potential money-pit issues to look out for with properties, so that you feel comfortable with your EM going hard without a proper inspection, etc.

I have two points for the mortgage.

or, you could house hack with a $3000 mortgage and collect $1400 in rent. 

With a low down payment and being put on a 15 year mortgage, this property has great equity that we leveraged with a equity line.

Rents on the extra units likely will not pay for your mortgage and you'll need to pay full rent on the unit you occupy.