Here's a Youtube channel where the author explains construction methods. Very educational. He's done a number of different projects.

By the time you build a real foundation that will pass inspection, and bring a shed up to a real livable people house instead of a cow house code compliance, you’re going to cost yourself significantly more than a standard inexpensive stick framed house.

Much like lipstick on a pig, the building in the image above looks like a pole barn.

Some newer tech is being developed with this framing technique.

There's a wonderful and gracious person on here named Buzz Solo who is in the process of building one. You may want to look her up.

Wood stuck in the dirt won’t meet the building codes. Turn that into a pier and beam foundation or slab that actually will pass inspection for a home, and you add 30K-60K.

2x4 on 24” center with no tiedown straps or other bracing, won’t meet code requirements. Make that into 2x6, with proper bracing and strapping, and add 10-15K.

$49 box store windows that have no double glazing and meet no standards any where turns into a 20K-40K upgrade to get even the minimum required glazing specs.

Spray on adhesive cellulose at a R-5 won’t meet any insulation requirements anywhere in the US. Add 15-40K.

Chicken sheds don’t require but a couple of hanging protected fixtures. An actual house requires a complete modern electrical plan. And lots of lights. Add 15-50K.

Chicken sheds don’t have plumbing, unless it’s a rudimentary cold water supply only. Add another 45-75K, as this includes waste removal also.

A “pole barn” is nothing but an expensive shed and an even more expensive house by the time you add all the things that a house absolutely requires. People who live in areas where they decide that they can skip doing health and safety code requirements are just paying with different costs than building costs. They choose to pay part of the costs with the health, safety, and comfort, of their family instead of money. Imagine growing up in a building that’s freezing and damp in the winter, with bits of breezes coming in through the zero air sealed and properly insulated windows and building. That’s your kids paying for a non code compliant building.

Whatever local builders are doing for homes is usually the most cost effective method.

There's a lot of stuff targeted at the naive DIY market.

I've seen kits for kit homes delivered at significantly more than traditional materials cost, factory built homes sold for less, until you add the foundation, plumbing, site work, etc.

I believe you would be better off incorporating some of the aspects of the pole barn into a conventionally framed house. Simple rooflines, exposed fastener metal roofs and walls, and straightforward layout will save you money. Some of the pole barn builders around here are receptive to making the changes required to make their product into a house, but add up all the changes and you lose the efficiency of the method of construction.