Having worked with S.S. quite a bit I can tell anyone looking. S.S is difficult to work with at best. I can machine 2 or 3 times the amount of steel parts in the time it takes to do 1 S.S. part. The cost is also very expensive. I just bought a new roll of S.S. welding wire and it was just over $300.00 for about 40 pounds.
OT, I applaud you for your effort, it certainly looks like a quality made piece. Many will not purchase it based on the cost, but if you made it cheaper every one of the purchasers would complain about it's short coming's. I also make and sell some things (not washers) I tried to lessen the quality and lower the price to meet some customer request. Never again. Even though I would warn of a lesser product, and they would say it did not matter to them, as long as the price was right, as soon as there was a problem, that was out the window and they wanted me to replace or repair it. I no longer will compromise my integrity by doing cheap work or less than perfect repairs. Yes, I have probably lost some sales because of it, but I probably could not make anything on those sales anyway. A hobby is one thing, but if a person is plying their trade to feed their family, they should receive an honest wage for an honest job.
Joel Salatin made a good point when he said he had someone tell him $2.00 a dozen was too high for a eggs, while drinking a 75 cent can of coke!!! It is all about personal priorities.