Well to me that raises a bit of a flag as it possibly means other TAG pilots are not interested in it or that they have had trouble finding rated pilots for some reason.
As above - ask about the owner / pilot turnover / reason for this job coming up.
TAG operate a principle where each aircraft have a CAM (Client Aviation Manager) who is the lead captain and will be involved in the selection and will be the person who writes your roster etc.
I would want to know how many pilots there are (4+ is good, 3 means likely your time will not be your own and you could end up using leave frequently and 2 pilots is a massive red flag unless you have no personal life).