well when you bury a container feel free to do it how you want, to build a reg floor vs what ive done is like $300 difference, to add only wall support as you suggest would be much much harder as youd need to fix it to the actual container and the corten steel is an absolute b*tch to weld!!! Much safer to have cross members to keep the wall studs pushed out then have a weld that could fail.
then also the entry point through the top would be alot more work if flipped, theres more then 1 way to do this and my ways done and its strong enough. The excavator hire was the most expensive part of the build and was only available at the time of moving and bury so had no way at all to flip before fitout. youve just gotta work to what you have and problem solve as you go.
anyways an argument about how to bury a container with people that havent actually done so themselve was not what id intended, im more interested in others layouts and how to mitigate Issues that arise while growing inside one and what would they do different next time.