Your friend will save *heaps* of money, not to mention a life, by adopting a Pug/Beagle cross from a shelter. Half the time, these dogs are coming from the very same "breeders" that sold the animal to someone for a couple thousand bucks. The new owners suddenly realize they can't deal with the health problems of an animal whose lineage is telling it to track for hours, but whose conformation doesn't allow it to do so, and they drop it off at a shelter.
A good rule of thumb- if the breeder doesn't have a clause in their contract stating that any dog they breed comes back to them *exclusively* should you decide at *any* point in the animal's life that you don't want it, you don't want a dog from them. (Most designer dog breeders do *not* have this clause- and that's a sign of breeding for financial gain, not passion).
Breeding dogs right means that you won't be making a profit. For people to actually make a profit, they need to cut corners, and LOTS of them. The popularity of "Puggles" right now is a sign that a ton of people are making a lot of money, and doing so off the backs of unhealthy and untested animals.
Sorry if this seems like sort of a downer- we're not trying to attack or judge (in fact we all love mixed breed dogs here- we just hate to see them being bred for all the wrong reasons). Good luck to your friend.