Rob, There is a company in Minnesota that manufactures wood and wood/oil and wood/gas combo furnaces. I've added a link for you to look at as a alternative and for some information. A friend of mine used one,when his wife had MS. He filled it with wood before work in the morning and let the oil take over at night. A little pricey, but for him it was worth it. My opinion is it's easier to do alot of shopping around before making a choice.
We use straight wood in our furnace in our house for main heat, and a new lennox oil furnace for backup,until the oil prices goes back to being reasonable,which I doubt,but always keep a few gallons in the tank for back-up or for when we clean the wood flue.
Hope the information helps.