Even more interesting questions! Keeping it on the G-reg and flying on my British PPL sounds an interesting option to investigate.
The reason for the question is that my partner (a Brazilian citizen) and I are looking at moving to Maringa and trying to find a job/start a business there. The move will be permanent, rather than as tourists. We'll be married by the time we make the trip, so I hope the visa thing will be sorted (still looking into that one).
Thanks very much for Roberto's details. I'll drop him an e-mail with a few preliminary questions.
Pitts2112