What are some of the disadvantages of beginning full timing?

If and when I go full time I'll sell my place and drop $50k into a CD for an exit plan. I live in the country on 14 acres and at 59 it's getting to be more than I want to deal with. I could probably sell the place for $225k and burn the rest living out my life at $13k-$15k a year. Social Security, pension and 401k will kick it at 65.