I am too newbie to really have the timerity to answer questions atm but as no-one else has answered yet I will have a go.
I think the trouble with getting another male when you dont have lots of females to keep them busy is that it can make them very frustrated or even ill.
So unless you plan to use him on open stud - can potentially be a bit dodgy re his health status - you will have to also go and get 3 or 4 more queens to keep both studs happy.
Also, studs cost squillions of ££££££££ and need some kind of specialist set up - but as you already have a male you know that
In you position, I would be inclined to get more females and mate them to an outside stud before I started to look for another stud of my own.
But, I am a total idiot newb so I am probably right off track here.