building a keezer any advice?

-do it right the first time so you dont have to keep upgrading it.
-measure out enough space for kegs and (if you're keeping them inside) tanks. don't include the shelf if you dont have the vertical space, which you probably wont.
-get forward sealing faucets that dont get stuck all the time
-watch this: http://www.northernbrewer.com/connect/2012/05/how-to-build-a-keezer-kegerator-freezer/
-it's really easy. i was able to figure it out and i'm a **** with this kind of stuff.

 

I hate to answer a question with a question: How far are you going with this? Drilling for taps? Building a showcase?

 

In addition to what beersader suggested:

Determine your layout before you buy your kegs/tank. You can use paper cut-outs to check your options.
It really is easier to get high quality parts at the beginning, eliminate the "I should-of's".
When buying kegs, remember the +1 x 2 rule. This works for all your small hardware parts also.
You may be an average-beer-guy, but when you finish the project you will be a better-than-average plumber. (And no, it's not really difficult, you just learn many new skills/techniques)

I recommend you do not keep receipts so you never know how much it costs.