i agree with those above with selling off old/redundant gear and going for a second body. In addition to that, I also agree that you should aim for the sigma 30 to complement the FA77.
I'd like to argue against going for the DA*55, as the sigma 30 would make a better low light lens imo and the FA77 already makes a fine portrait lens.
I'd also like to argue against the elinchroms in favor of alienbees. Even if the Dlite heads are cheap, the mods for elinchrom mount are very expensive. The only time i would suggest elinchrom is if you decide to go all the way and go for a quadra setup with the rotalux. Otherwise, go for alienbees for their much more affordable strobes/mods. Going cheap with alienbees would also be a good investment for your first studio strobes, the cheap mods and units help you decide how you want to shoot with strobes, the service from PCB is second to none and you can sell them for about as much as you got them for. In that sense, its like renting until you decide to step up to profoto, broncolor, elinchrom, etc.
Furthermore, i'd like to argue against the DA*50-135 and 60-240. From what i'm getting, it seems like you want the tele zoom for when your 77 isnt long enough and mainly to shoot wedding and concert type shots. In this case, i suggest the sigma 70-200.Here's my reasoning for why: fast HSM AF for concerts, fast 2.8 aperture for better low light over the 60-240, 70-200 for more reach over the 50-135.
Here's what i would do if i was in your shoes:
Sell everything that isn't going to be doing work (pretty much everything but your flash, body, 16-50, 77 and maybe the 40)
Buy second K-5 and battery grips asap
Invest in a solid light stand, go one-light with a single Alienbees b800 and mod of choice (beauty dish, softbox, umbrella, octa, para, etc) along with some triggers (yongnuo 603s if you dont need control, Cybersyncs if you do)
Buy a sigma 30mm
Buy a sigma 70-200mm f/2.8
Tripod
Slowly invest more into lighting
This would make for a fairly versatile setup in which you can pretty much have a main and auxiliary lens for most shooting. Since you'd have two bodies on you, you'll always have two lenses already mounted and ready to shoot. because of this, the 16-50 and 70-200 together would be able to cover about 80% of all shooting situations. If you need speed, just swap to the 30 and 77. If shallow DoF is what you crave for portraits, you got the 30, 77 and 70-200 at your disposal depending on working distance.
As for where I'm coming from, I'm also currently trying to pick up more work and I shoot with quite a similar setup to what I prescribed: a tamron 17-50, DA*55 and tokina 80-200. I'm planning on getting rid of the 55 and 80-200 eventually to fund an 85 1.4, as well as picking up a second body at some point, as I feel the 17-50 and 85 1.4 would be adequate to cover all my shooting. Unfortunately, school is quite expensive, so upgrading is going to take a tad longer for me