Hi Ken
you are looking at the right vehicle or equivalant of Transit T300. Whilst I appreciate the need to keep things as small as possible, I would consider a MWB.
I have a Relay 1100 on an 04 plate SWB. This is fine for me on my own, but space gets a little tight with 2 hose reels, 650l tank, poles, step ladder etc with 2 people. We manage fine occassionally but I would find it cramped on a daily basis. I admit that I am prepared for virtually every eventuallity so do carry more stuff than I really need. I am not a minimalist by nature.
The difference between a SWB and a MWB Transit is only 367mm (just over a foot), but (did - not sure about now) only comes in a medium roof version.
I find the best accessory I have purchased for my van is a set of reversing sensors off Ebay - definitely helps parking when you begin to trust the sensors.
Spruce