If you can get enough people to split up the costs and plan on using it often then maybe. You could also offer to extract oil for other bowlers for a small fee to at least get some of your money back

. For doing it yourself at home you don't need to use the oven or dishwasher though. A bucket/tub of hot soapy water out of the tap works well too with less possible problems. I know several guys that will fill up the tub and let the balls soak over night, but I think dumping the water after a half hour or so and rinsing the ball off in fresh warm water several times and then letting them sit and dry works better.