I did my first Warmoth build over the course of 3-4 months, ordering parts along the way instead of all at once, which was easier on the wallet.
Really didn't have much of a choice since I ordered all the wood custom instead from their showcase. Body took two weeks to arrive, and during the time I spent prepping and finishing the body, I ordered the neck and that one took a little longer to arrive. While waiting for the neck, I ordered the hardware.
Besides the neck, the electronics were the second most expensive part of the build, so I took a month off the build to save up enough spare money. I did end up assembling the bass minus the electronics, and was getting impatient waiting to hear it. When I finally got the money for the pickups and preamp, I called up Warmoth in the middle of the week and told my guy that I just HAVE to hear this thing plugged in by the weekend, and I got a good deal on expedited shipping.
So basically, yeah, I did spend $1200+ on it, but that amount was spread out for 4 months, about every other payday.