I've "done this" in London and the money is good - but not really compared to the cost of living. GREAT touring destination, but would not stay there permanently.
The weather is great - you just have to be there the right time of year for that. I can't recall a single day that rain ever ruined my shoots (I lived there off and on for a few years shooting stock photography) but the winter IS rainy and a bit cold...however I grew up where the word "blizzard" and "built in snow makeup days" were part of my vocabulary so I wore shorts in January there.
If you do work in Europe, make sure your condoms are Durex - they're made in England with a foreskin in mind (80% of European men are intact IIRC) whereas things like Trojan can be a downright struggle to get on. And take ALL batteries out of sex toys before leaving in case you get searched. If not they have to ask you "do you still have batteries in anything?" and you have to tell them what whereas if you have done this preemptively, they just set the sex toy to the side wordessly