tax laws have change what I though I was going to be able to do this year changed. I sold my van at a loss, and though I would be able to write it off tax's last as I sold it in July 2017. should have sold it in 2016 and I would have been able to take the loss. so when you are going to buy that last unit, think about when do I want to retired or I'm getting out of business, you have to think about the end of the game. thought I would pass this on. plus being retired I'm still making to much money and looks like might have to pay this year. you pay taxes and work hard follow the rules and they still want you to pay.