itdoesnthurttohavemanners did you really design it? Wow, I love you!!!
We currently have a 4m run of Pax wardrobes in the play room, DH and I have 2 doubles and 2 singles in our room, ds1 has 3 singles, ds2 has 2 singles, and the office has 1 double so in total we have 6 doubles and 9 singles 
Clothing wise (as you can see we use them for a multitude of stuff) we have for me and DH a double hanging rail and a single hanging rail, we use the plastic tubs with rails for everything else as you can overfill them and divide them with storage boxes. So t-shirts/vests/jumpers of mine are in the plastic tubs.
My two sons, eldest has 3 hanging rails, over 2 single wardrobes, 1 for uniform, 1 for tops and 1 for trousers. He is 9 but has very long legs so his trousers are hung up. Ds2 is only just 6 so he has 1 hanging rail for uniform and all his tops etc are in those plastic tubs.
Measure how much hanging space you currently use and then work around that. We are lucky that we started buying Pax 13 years ago, and still have the original ones, and our Ikea is very close by meaning a trip back to get a hanging rail or tub is a few miles away meaning it is easy.
Dh is 6ft 3" so his hanging rail is at the top of the wardrobe, then we hung his shirts in it to work out where the shelf would go then the tubs.
We spent a long time counting the holes to work out how much space each tub took up and remember the hinges prevent you from using certain holes. This was way before the planner!
Best things we ever bought, by far.