I've got a very similar sized unit in a MWB and certainly have had to plan it very well to fit it all in. Submount tank and the hose reel sitting over boxed-in nearside wheelarch, both make best use of space. Enough room for rotary and air mover, can squeeze more stuff in but then it makes it a nightmare to work with!
Enjoy it, very nice first machine hope the dust cleans off ok (seen the pics!)