I use the Excalibar (don't know about this spelling) for my studio lighting. This studio setup isn't (or wasn't when I bought it) too inexpensive--but not like a lot of the lighting systems. But it is portable and I take in on location frequently. Have had it for aprox 5 years. It works great with all of my Nikons. With the D60 it's awesome. I use the on-camera flash to slave trigger the strobes. I also use the large 60" umbrellas bounced onto the subject. I don't usually use a tripod and can move around the subject and room to get the best shots--which is extremely important with pets.
I also have two SB800s, and tried to use them for portrait lighting. Did not have good results. And I tried all of the ways they recommended. I believe that even if you used a third one, there might still be problems. They were also a pain to use. You really need larger lighting if you are going to do real studio quality work. You get shadows of varying degrees when trying to light a large area with the SB800s--in my experience.
I do sometimes use the SB800s outside, though. I also have a Sigma macro ring flash for product photography and can use it for a simple one person or animal portrait where I don't want shadows. The Sigma and the SB800s were not cheap.
I do different kinds of photography, some in my studio, but more than half on-location: portraits, family reunions (here you really have to have a studio set-up), lots of pets, models, products, taekwondo, wildlife, website and commercial, and everything in-between.