Here is something to conisder when you are thinking about the hours.
At some places your flight hours that you get come at a price Time Away from Base.
I have some months that my line is worth 90 hours and 180 or so TAFB, other months I do a 70 hour line with TAFB close to 300.
Sure you will have plenty of time to work from your laptop in the hotel, but there are also times that it is hard to be home for any amount of time at all.
I agree that the theory of have a second job, an HR job with flexible hours and whatnot, you might find it hard to work it for both jobs.
Just something to think about