Lets start at the top.
Why would he need TTL pocketwizards for what he is proposing? Oh and I have tilt/swivel lightstands for my sony hotshoe, and they cost exactly the same as for a standard iso, and are just as easily available if you are going to be ordering online.
I cant find you a native 70-200 for $600, but I can find you lots of second hand 70-210mm f4 for $200 which is amazing glass for the money. As for the rest of the line up you are completely disregarding the impressive konica minolta line up pre sony, which are still pretty easy to come by.
While it is fact that there is no 'a99' yet, I question the need for full frame, when the crop sensors in the latest releases are coming so close on resolution and noise. The a77 is weathersealed ASAIK.
You only need to look at biomech's credentials to see that you can shoot professionally and shoot Sony without it being an impediment.
From what the OP is looking to do, I think it is entirely appropriate that he continues to shoot sony, just as I do. Sony and Nikon trade off the moronic attitude shown by some and thats fine, I just dont subscribe to that. I
f your living means that you must be able to get a replacement unit that day, then the availability of the replacement kit is of course important, and this is where Canon and Nikon have the edge.
If you think that you are going to get better photos with a Canon/Nikon as opposed to a Sony then you need to take your head out of your *&^% and evaluate who is actually taking the frame.