Oh, so u have land, great!!
There are engineered plans available for earth bag building, I have looked at this construction method closely , most structures are relatively small. Sourcing the bags is a bit tricky, and is no place to skimp, bag failure in the future is an issue.
Understan they say you can do what you want, but some level of code will be required, the electric company is not going to connect without inspection, and the health department will be very interested in your septic, .
And everyone nnb e u deal with is going to thinkvtwice.
Not raining on you, but I have been there, I built an all wood foundation once, one inspector went postal on me, sorry old thing,
I am 63, built 2 complete homes, and have been married to more than one idea or system,
Also, I have an engineering degree, and technology moves forward, in fact in the last 20 years earth bag has leaped forward!!
On the other hand stuffing wall cavity with insulation is not a very good use of money, there are better ways.
Just a thought, earth bag us very physically demanding, walls need protection from sun and rain during construction
Also consider resale, if u want or need to sell going to be difficult
Paul