A year ago my industry was in complete shambles, so if the job didn't work out I was probably going to switch industries anyway. The place was only $90k so if I needed to turn around and sell it I could, especially with the housing marking going insane. With the two rooms rented out my net cost is around $350 a month, so even at half my salary it would be pretty easy to handle the costs. So overall it was fairly low risk.
Looking at comps in the area, places that looked fairly similar but with half the land and no detached garage were selling for $120k-ish. Similar places but in nice condition, half the land, and no garage were selling for $250k-ish. I think with everything finished the place will easily be worth $350-ish.