Have you looked at the inner tubes and made a determination if they can be patched? For $3 you can go to an auto parts store and get
enough rubber cement and patch to fix about 10 bicycle inner tubes.
I am pretty sure if you were to pull off the tires on my
tractor just about every wheel has 3 patches holding the inner tubes together. Its not a junk tractor either, its just that an inner tube that holds air is just as good as a $700 brand new tubeless tire.
I know it is a dying
art, but I still patch inner tubes, still buy tubes when my tubeless tires go flat.