If your machine is in good working order and you have the knowledge to set it for the given crop, I see no reason not to collect custom hire rates.
If however you are in the learning process and simply wish to recover your expense till you aquire the knowledge, you may find someone to help, but you also may be turned away as there is only one chance at collecting the crop.
If you were in my area, I would likely give it a try. If you could do the job on average as well as anyone else, I would pay you the going hire rate.