Hello mate,
I have a 650L tank in my trafic van, tank is in a frame and up against bulkhead and bolted to floor, hose reel is fitted to inside of roof with pressure washer fitted underneath leaving enough space for extra bits
I have my trad equipment on the left near rear doors with some high pressure hose next to it.
The space between bulkhead and tank ( bottom half ) is where I have my pump so it's out the way and can't be damaged
Am not finished yet mate, and I will be adding another hose reel, pressure washing reel and other bits but.....
We get there in the end