$65k "profit" not including labor wouldn't seem so bad if they could have worked on it full time and gotten it done in 4-6 months, right? You could certainly live on $60k/yr (split proceeds from selling two of these), once you put in the initial capital to get off the ground. I guess on the pro side, you would assume they'd get better at it as they went along; on the con side, maybe they got lucky with the selling price for this one and it's not a repeatable business process.