As for the job - consider whether you should line up a new job first before quitting. I know its tempting to just chuck it, but its always easier to get a new job while you still have a job.
Take a deep breath about the other decisions. Which house would give you the most rental income? Which house would be easier to manage as a rental? Does your son have a preference? Does selling the house now in today's market pencil out as better than keeping it as a rental?
