Good day,
I don't currently have a ferret however it has been much discussed and before I go any further I would like to ask some questions.
Firstly this is what I would love. As I own my own small company and it is a very relaxed atmosphere I would love to take my ferret into work with me nearly everyday. It is a quiet office environment generally and coming out of the run would be more than likely. I would love the ferret to join me in my van, securely or have the run of my van. Is any of that possible?

At home we have two 8month old kittens, two older labs and one Rhodesian Ridgeback larger than life puppy. It is a large barn conversion with wooden floors and lots of ferret friendly play zones.


Any information is helpful, would adopting a RSPCA ferret be good or would a kit be better?

Will

Being a newbie to ferrets.  I suggest purchasing a book called "Ferrets For Dummies" by Kim Schilling.  It's a excellent ferret book and it's a must for all ferret owners
 
First thing I would do, look for a ferret knowledgeable vet in your area.  You will need a vet.  Save your money, ferrets are not cheap animals.   Any questions, please feel free to ask.   We have a great group here. 

Hi and welcome.
All of that is possible with the proper planning.  I bring some of my ferrets with me (1 at a time) when I run errands.
The biggest concern with that is keeping them from getting out the door when you do.  I would think you'd need a cage or carrier in the van for securing your ferret when you open the doors.    You cold either use it to transport your fuzzy into the office or have a separate one there.  My ferrets sleep most of the day so it shouldn't be a major distraction.  I don't know where you are, but you obviously can't leave them in the car when it gets hot.  They don't seem to mind the cold much, but temps over 90F for more than a few minutes can be live threatening.

It will be up to the individual pets to accept the new species.  I've had ferrets with cats and dogs and have been pretty lucky, tho the last cat and dog did play too rough with them.  I had a ridgeback/lab mix like yours, a 120 lb puppy who loved all of the ferrets.  3 female cats all reacted differently, but none were aggressive.


I've had ferrets that could squeeze through a gap as small as an inch so "ferret-proofing" is critical.  My Alice used to nap under our new kitchen cabinets and I measured that gap at 3/4 inch.  She was barely 1 1/2 pounds as an adult.

THE DOOKS OF HAZARD

Think its possible for the office, but the van I would not do. There's so many place in vehicles that could be dangerous or difficult to get him out of if he got in - such as the vents or inside of a seat. Plus if it's moving while you're driving that can be scary. When I brought rambo home he busted out of that cardboard box they give you and tried to go under my pedals. I had to stop and remove him, harness him and hold him tightly on my lap for the rest of the journey. It was stressful for me. 

Office I think should be good. Still, ferret proofing is a must and I would also try to get a general idea of "if he got out of this area where could he end up" just so you know in the future in the event of an escape. 

Animals are all particular. Do you have a friend with a ferret? I'd imagine the kittens are young enough to accept him, but it all depends if they are prey-driven animals or not. My cats are ok, but one does not like them. She tries to bite them (I don't think to hurt) but knows she isn't allowed to so she backs off when I glare at her. She's fine with them home alone. 

Dogs I have no experience with. 

Definitely get the book wenmister suggested.

In the office I'd say go for it as long as ur fuzzie can be entertained I work from him as a computer tech buying computers in bulk for companys fixing them and selling Nippler either sleeps on my desk or in a empty computer case. I even made her a small maze she loves it

So I totally misspelled my ferrets name its nibbler lol