.. dont forget all the "bread&butter" modules you are going to need (f.e. buffered multiples for non-audio (LFO, ENV), many attenuverters - (attenuate, damp, invert, shift/octave) for propper "positioning" of your modulation-signals before going into your Boutique-modules -, mixers, aux-ins (from line-level) aux-outs (to line-level) for propper gain-staging.
Try get a bunch of stackcables (TipTop) for splitting signals (not merging!) easily - you are going to need one modulation-source sent to different destinations. Following your signal-flow (mental) will be easier this way.
But most of all I would advice you to get the THREADED STRIPS /rods instead of the M3 -nuts which usually come with your rack. Try searching for "eurorack threaded strip".
Otherwise positioning these M3-nuts correctly underneath/behind your modules will drive you "nuts" - and getting the last module in is a real puzzle. You will change the position of your modules in the beginning very frequently. These strips help a lot making it painless.
.. and the one power-unit in the lower left corner will not be adequate at all if you are thinking skif-shape.