We each have 2 wardrobes, 1m each, so 4 m ; some of them are 2 rails, some have drawers. Coats & jackets are mostly kept separately in hall cupboards.
I'd be wary of fitted wardrobes, they are very expensive.
We had them installed, then recently moved to a home with none !
We bought Ikea, which are very much cheaper, & paid someone to assemble them.
Dust on the top ?!?! Neither of us are tall enough to see it.