1 - I wouldn't consider myself successful at all in the industry, but in terms of personal growth I would consider myself successful. That's because I don't make music for money or to be successful, but rather for enjoyment. I am successful in my local community and circle of acquaintances but definitely not within the music industry in general. I only play in little dingy pubs and bars about once a week and don't get paid much.
2 - I don't mind at all that I don't get paid much for my musical career, but only because I have another job - as a music teacher! Which allows me to pay the rent each week
I realise that as a tiny, independent artist it is impossible to make money in the music industry and have come to accept this. Which is why I decided not to centre my musical endeavours around money, but instead around enjoyment.
3 - As I've already discussed, the money doesn't really have a huge influence on where I play. But, if a venue offers me an extremely small amount and it is very far away, I probably won't take it - because I'd probably spend more money on petrol than I'd get paid!