TOP-DOWN HUGE ASSEMBLY MODELING - COULD I USE LAYO

I am comfortable with creating Tp-Down assemblies (big or small) using a master sketch. But, down the road, I found the parts created from the master sketch carry all the sketches in the master sketch. That led me to manually hide (and make visible) out from a bunch of (so many) sketched, planes, etc. It is doable (kind of easy).

However, I believe building up on the layout in the assembly (which is a top-level master assembly (TLMA), but not necessarily the final assembly: I mean, the final erection assembly can to be created with the help of this TLMA) is better where all the components now have only the few (some times just a one compared to so many using a master sketch) required sketches of features.

It looks like good and also not good. As I am new in Solidworks, I would like to get some feed back from the good users of Solidworks. I want to make sure that anybody down the road could be able edit the model. Please reply.

I attached my model up to now.

Using CREATE LAYOUT