thanks very much for your replies, everyone.
Just to clarify, all the paint is going to need to come off the whole van, down to bare metal all over. Then it'll be over to the professionals for welding, filling and all that bodywork thang. Want to get as good and as durable a result as humanly possible so wouldn't trust myself to do the filling perfectly.
i guess i need to find an option which is cheap, doesn't take too much effort, and can be split down into small stints of about 20/30 minutes at a time (including set-up and clear-up time), because of the M.E. You're right in thinking that I don't have access to any heavy-duty equipment. Have to find a way to do it which doesn't need elbow grease too, as I don't have the power in my arms.

- power tools are GOOD!
Moggyminor16 your method sounds the closest to the method which has been mentioned to me by my helpful local garage - except that you mentioned blow torches and my garage suggested hot air guns?

Sounds like Alec has found hot air guns noooo use?
I've been advised that you could use a sandblaster on various bits of the van but not on the back end, as it can warp the metal - anyone else found this? (it's a bit academic though as I don't have a sandblaster lol) I've heard though that it's the best way to strip a surface which has been (can't think of the right word but it's a finish a bit like pebbledashing on a house) because of all the little bumps.
guydenning the £60 dip and strip is listed in the current issue of the mag so goodness knows where they got it done - it was a small car though

- but possibly a typo as you say
My husband suggested getting a couple of old scrap panels and testing different stripping methods on them - what do you think?