Hi,
I already had a merc. sprinter so went strait for 1000 lt system
A frame ladder and 2 tier ladder fit inside easily ,
3 tier ladder on the roof can,t be reached without a smaller ladder
(bit of security)but very rarely use this any more (had to grease the clamps last time before they siezed)
and still room for a dance.
The only down side compaired to other smaller vans is that it will use a bit more diesel, as most of my work is quite local its not a major issue.
(I recon I get about 24/25mpg)