The 15g Conicals were purchased from TankDepot.com http://www.tank-depot.com/productdetails.aspx?part=A-INFD15-19 the racking valve is from LD Carlson the whole setup cost around $225. I have never had a problem with o2 permeability. They are MDPE and around 1/8" thick. I use standard pvc valving in the bottom to go down to a 1" ball valve. The racking valve is 1/2" OD which is great for racking with a 1/2" tube going to a 1/2" swivel fitting to my liquid ball lock QD.
I think if you wanted to make the cheap version of a beer gun is to take a bottle wand and attach it to your liquid side of the keg, basically a beer gun set up. Keeping your bottles cold before bottling helps reduce foaming as well. I keep the sanitized cases in my keg freezer before i bottle, when there's room
Correct, a Ranco 2 stage you can get wired for around $80 that comes with a single gang dual receptacle one wired hot the other cold, the single temp probe runs both stages, you can set the set point on both as well as the temperature differential at which you'd like the stage to kick in. These are really cool ETC's I use on on my herms system to run the pumps for the mash.
I have 5 of these [url]http://www.tank-depot.com/productdetails.aspx?part=A-IN0015-19[/url outfitted with racking arms and valves in the bottom. They work great and fit perfectly in a medium size cabinet (upright) freezer. Great for cold crashing and lagering.
I personally wouldn't worry about the faucet locks, if you're disconnecting your kegs and locking the keezer. I completely agree with bo about the hasp and padlock. 20 bucks vs 45 a pop for faucets locks.
When I ran a homebrew shop the biggest thing that people wanted/needed was a way to regulate fermentation temp as it is the hardest thing for homebrewers to control. a small chest freezer outfitted with a temp controller works for the summer, you can find something online for usually 50 bucks. as far as affecting your final product it is vital. and not only will you be able to hold your ferm temp but you can also use it to cold crash your beer just like the pros. A chiller is easy to make and usually cost about 30 bucks. 25' of 1/4 or 3/8 tubing fifteen feet of tubing and a 3/4 hose to barb fitting is all you need.
I mounted my two main pumps on my brew stand underneath a piece of expanded metal, but I also have a third pump for my CIP system on my fermenters that I built a small stand for similar to sabco's chill wizard just an 8x8 piece of diamond plate with some feet on it and a carry handle that has a waterproof switch box, works great.