I'm with Don, it depends on how much gear you have. As I mentioned in your other thread, I used to have a Hilux Intimidator and it was great, but I wasn't window cleaning at that time and I, personally, wouldn't have used it for cleaning unless I was tradding bungalows. I've got a 350 litre tank in a Ford Connect and I now need something bigger, so i'm looking for a Toyota Hiace. If you just do basic domestic stuff and it's local, so you can refil from home if you need to, keep it simple with no trad gear, gutter pole stuff etc, then I am sure it can be done. There are a couple of guys who use pickups on here, hopefully they can help.