@fire Earthbag construction is so labor intensive but not as labor intensive as packing tires. I personally am going with the Monolithic Dome airforms. You could make your own airforms I have not done so myself, but i visited a home in CO where the home owners made the airforms. On there website they sell a book on how to make airforms.
Here is a video I made of the home i visited and I have a link in the description to the website with the book.