I"ve avoided this thought for quite some time now! My setup is pretty miniscule in comparison to most the one's I've seen on here. Seeing that this is a hobby I try limit my out of pocket expenses to as little as possible.
I got all my carboys for free. I have 4- 5 gallon with no spigot, 4- 5 gallon with spigot, 4- 2.5 gallon with spigot
I think I spent about $75 on the thermometer, hydrometer, graduated cylinder, auto siphon, scale, fine mesh strainer, bottling bucket, sanitizing bucket, french spigot.
$65 for my 5.5 gallon pot
$33 for my immersion chiller build
$20 for my mash tun build (got the cooler on sale at Dick's sporting goods and bought it with a gift card I got for my bday. The $20 was for the hardware from Lowes)
and $55 for my kegging setup which is 2 ball lock corny's, a single tap tower (free from a friend), a shank faucet, 5 lb c02 tank, gas line, beer line, etc... (only had to pay for 1 corny. I used xmas gift cards, bday gift cards, got a $300 gift card for switching to verizon fios, and I got $250 for refi'ing my truck with a different bank. lol)
I got my beer fridge from selling my house and having to buy a new stainless steel fridge so I just kept the old one for my kegs, yeast, hops, etc. Went to habitat for humanity and got the new one for $450 so it's like 2 fridges for $450, not bad!
I borrow my burner from my father in law who only uses it 2 times a year, at most, to steam blue crabs so it lives at my house.
Any chance I get to upgrade or add more hardware to make my brew day quicker, easier, or better, I do it. I keep my ear to the ground for promotions for free gift cards and I let everyone know what to get me for xmas, bdays, father's day, anniversary, etc... I'm easy to shop for!
It's taken me about 3 years, and a lot of patience and diy, to acquire all my stuff so far. My draft setup alone took me about 14 months to make happen. I brewed 2.5 biab batches for over a year on my stove top with a borrowed pot and I still made great beer. This hobby is amazing and worth all the waiting, money, time, and learned skills, that are needed to get into it. Beer rules.