I'm going to go out on a limb here and assume this is a young new guy wanting to have equipment like the big boys that he doesn't need. With 5 accounts and maybe 5 more this year doesn't justify a new 16 ft trailer. Also with just a Walker and 21" you don't need that much. You will eav yourself very little room if any for profit. If you think you MUST have a new trailer buy a used 12 or 14 ft for 600-800 and save your money.