"I told the cheaper guy that if he was in porters lake at any point to come by. I don't think he is local so I'd rather not make him drive all the way out just to look at it. I'm sure I am aways off from. Breaking sky."
You have that option at present, however, it's a buyers market, and, open bid.
You mention that the one HM would also pour the floor. Who will be responsible for the additional masonry height extension, or did that come up, in the conversation.
Consider obtaining separate bids for specific trades.
Remember, it's your time, and money.
"As for lifting higher, I wasn't set on my measurements so what ever night gives me adequate room under the house.
I am thinking more for resale but also it's always in the back of my mind that the pipes are going to freeze.
They are double insulated but it still get cold down there.
So the foundation would be a great piece of mind."
Is it your intension to access the new space from inside the dwelling, to convert it to habitable space, with a walk-out? Where is your comfort heat plant now, and/or your laundry facility?
Relocating and upgrading the comfort heat plant, depending upon how the existing is run can be relatively simple.