Should have thought that the company would invite you to work off your bond before engaging in time share negotiations. Unless, of course, you come to them already type rated or contribute towards the cost perhaps?
Sounds as though you are a happily married man who values nights at home. It might just be an idea to make very sure that the little lady understands the potential, I say again potential, damage that the 'wrong' kind of a rosterer or crewer can inflict upon one's family and social life. Of course this has already been done, no?
One warrants that, with a short haul operator, if you work only 80% of the time, it will not be long before crewing decide that the other 20% of the time is actually standby. Perhaps unexpected callout requests might follow from that presumption?