All I need and use on my diy pedalboard is a tuner, a "Channel 2" - overdrive pedal by Duesenberg and a BOSS SD1 as second overdrive pedal.I have set the Duesenberg pedal for light overdrive and the SD1 to create a more full and singing overdrive when both pedals are engaged .
I also sometimes use a Fulltone Fulldrive 2 instead of the Channel 2.
And sometimes (only when I am alone at home) I put in my ear plugs and just use the natural od coming from my tube amps at full volume
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If you were to add a simple daisy-chain cable to your board, you can do away with 2 of your 3 wall-warts. The TrueTone One Spot can supply 1,700 milliamps (mA) through a daisy chain cable. They make different ones... I have a 2 pedal, a 5 pedal and an 8 pedal version of daisy chain cables.
Usually the owner's manual tells you the current draw in milliamps (mA)... Tuners and overdrive/fuz/dist boxes only eat about 10mA or so each...
If you need to know what mA your pedal(s) are/is... check out this page, he list most everything but hasn't been updated in a while... (scroll down for list)
Also, FWIW while we're talking Milliamps... the Voodoo Lab Pedal Power 2 only puts out 100 mA per output... whereas the Strymon Zuma has 9 outputs and each put out 500mA each... you might be able to daisy chain a few pedals out of the Voodoo Lab box, but nearly unlimited (I had 30 hooked up at one time and no sags or noise) using the Zuma and daist chain cables...