They seem to be in the model of mostly PT instructors. It's a good idea to want to work PT on days off. However, keep in mind that if hired, you would have to (Legally under part 142) go through the entire initial training program (ground/sim even if you're already typed in it). This could be hard to accomplish if working full time for another job as you'd need three weeks straight to do this. Some training centers allow you to do the type in segments.