I don't see the capacitors in your basket? If you prefer USA sellers, how about the following. In most cases I found you more parts for less $. I'm not sure the size of the Prototyping board you chose, but the one shown below is more than large enough and much less $. So to be clear, you're undertaking this DIY for fun-and-amusement as part of the hobby? I thought we had settled on a one-per-siding Delay-Off relay module approach (no soldering) and that you had already ordered modules. 
