I'm on mobile so sorry in advance for any typos. 

First, being a trader would work out fine. It keeps money and goods coming in to the pack, and it's a good cover. As the pack Beta chose to present as head of the household (which also implies business ventures), Vel would probably work with him directly. Nikita's presents as the head servant (I'll need to find out what that's actually called), but she actually has a hand in every profession each pack member chooses, just behind the scenes so as not to arouse suspicion. I think the only thing humans would suspect is that the head of the household is having an inappropriate relationship with her if they suspect anything at all. 

 I'll specify in the pack rules that they should never be alone when transformed (just have to wait until I have access to a computer to edit). While in human form, it's just encouraged to not be alone but it's not a rule and it's not enforced.