some contractor companies will charge you the same for direct and looping..... just that they will determine which gets direct and which gets looped....
for my case, i pull one 4mm direct, then use eubiq track....
my idea for looping, never have it side by side..... if i want side by side, just use track or extension cords....

remember, cable size also plays an important part..... you can loop if you are using thicker cables.... all according you what you want..... with 4mm cable i can turn on 1 induction, 1 electric kettle and 1 oven toaster at the same time, roughly around 4-5 kW

you need to check with your new apt allows you to hack anot.... some apt cant hack as the walls are load bearing...