Thank you to everyone for your advice and response.
I live on a farm near Peterborough on 200 acres. 100 of it is mixed bushlot. Years ago I milled the lumber for my horse stalls by hand with an Alaskan chainsaw mill with a Stihl 066. That was slow and a huge amount of work. Last summer I picked up a Woodmizer LT40HD28 with 250 hours. It is amazing how fast, accurate and efficient it is. I work during the day as a computer consultant and at night and weekends as a farmer. So I don't have the time to harvest my own wood, so I thought I would buy the logs for this next big project a 100x180' riding arena and mill them on the weekends in prep for doing the building this summer.