$10,000

[Tabor Warren Photography]

(Using prices I actually paid for some of the equipment below or have seen very recently.)

$2,549 Canon 5D Mark III
$1,799 Canon 70-200mm f/2.8L IS II USM
$1,799 Canon 24-70mm f/2.8L II USM
$1,399 Canon 16-35mm f/2.8L II USM
$1,299 Canon 35mm f/1.4L USM
$899 Canon 100mm f/2.8L Macro IS USM
Grand total = $9744

Seeing my wife's reaction to the splurge... priceless.

 

[bainsybike]

Tabor's lineup looks like a good one. Let's see what it would cost in the UK.
Using the lowest currently advertised online prices we have:

2719 Canon 5D Mark III
1899 Canon 70-200 f2.8L II
1790 Canon 24-70 f2.8L II
1195 Canon 16-35 f2.8L II
1145 Canon 35 f1.4L
729 Canon 100 f2.8L Macro

Total 9477

But that's £ (UK pounds). Equivalent to about $15,500.

 

[sagittariansrock]

you slowly start buying gear and one day your gear is more expensive than your first car.

…and then one day, you buy a single lens that is more expsnsive than your first car.

I got a really, really good deal on my first car (a pre-owned Ford Escort), so I crossed that limit when I bought the 17-85mm IS USM for $ 325

To answer the OP:
5DIII- 2450 (actually paid)
24-70 II- 1550 (actually paid)
70-200 II- 1700 (actually paid)
35mm A- 700 (actually paid)
135mm L- 700 (refurb 20% disc)
17mm TS-E- 1600 (refurb 20% disc)
Gitzo 2541- 550 (actually paid)
Arca Swiss Z1- 300 (actually paid)
600EX-RT x 2- 700 (refurb 20% disc)

Overshoots by $ 250, but whatever.

This was a really good exercise, because I own most of these except the 17mm TS-E and the extra 600mm, which means I did use my money wisely so far. Lots of buying and selling on the way, and lots of lucky deals. But I am at a happy place

Also means I have $ 8K of equipment just for hobby. WTF!!!

I just realized I have finally all that I had listed a couple of weeks ago, yay!
(Also means I have blown over $ 10k on camera gear, yikes!)