Walking donkeys can be hard, as unless you break them to bridle/have quiet roads they can be strong and just run off (not an experience to repeat)! We shut them in a starvation paddock in the summer and it just about keeps the weight off - it looks like there is nothing there, but they'll eat...
BSJA asks you register under the name thats passport, unless it is already taken in which case you'll get roman numerals tagged on... From those that I know who have tried, it is rather expensive to register a different name and most people don't bother when they get the cost! No one really...