Keeping track in a shared Dryer/ Bin System between two separate farmers.

I farm with my uncle and we have our own land, and trade labor and equipment to get the job done and even up at the end of the year. He has a dryer system that is in need of replacing and I have been sending all my grain to town out of the field. We have been talking about how we could expand the grain system to include my corn and beans. We want to be able to keep track of everything and keep things fair. He has about 2.5x more land than me.

One thing I have been considering is that if I were to buy a new dryer system and if he would build a couple of bins. Electrical, gas, and bushels can be accounted for and divided out as we switch back and forth. I would charge him on a bushel rate and he could charge me storage. Then if we wanted to divide things up in the future there is a clear line of who has what.

Anybody else have other suggestions or ideas that have worked for them?

Thanks!