I don't have any experience of topping up Adblue but it seems to me from what I read its a regular check that is needed and if needs be a top up. Is that not the same as tyre pressures, washer bottle, engine oil? I check these things in ANY vehicle on a regular basis (once a month when I wash the car - its like a normal routine, part of ownership) just like all of us should do, so just include Adblue in these level checks and act accordingly. Adblue is widely available and has been used on commercial vehicles for some years now. It can't be that complicated, or am I missing something.