Q's for car transporter drivers... (Artic trucks)

Hi all, I hope I'm in the right forum. Apologies if not. My other half is finishing off his lessons for an artic truck license. He also has his ADR license. But I just have a few questions on his behalf.

He is mainly looking at car transporter jobs. So he wants to know

1.) Have you worked in this area? What is/was your experience of it? How did you find it?

2.) We are a family of 4 (2 sons) with one car. Should we be looking into getting another car or is there ever an option of company cars (obviously starting out kind of thing)?

3.) We've heard that there can be "rewards/bonuses" throughout the yr. Do you have any experience of this?? What kind of "rewards/bonuses" are they??

Thanks in advance for any feedback.