( I know nothing about PEA norms & standards ) in Euroland each outlet tends to be wired directly back to 'its own' breaker however in UK land outlets tend to be wired so that a group of outlets is on a single circuit ( "a ring" ).
OP, if I were in your shoes I woulld hunt around for an experienced design engineer and see if you could persuade him to design ( with scope for changes & expansion ) a distribution system layout.
FWIW I wouldn't be expecting this same guy to implement the design....I would expect him to be sufficiently involved that he could sign off that what was implemented was what he designed.
With all the electricial stuff that is around these days ( solar panels, batteries, electric gates, water pumps etc etc ) the design is not necessarily trivial