It's probably too late for this trip, but would a house swap be a possibility? You could find one as centrally as possible to your friends and family and let them come to you - friends of ours did this on their last trip and said it was a huge success, they weren't running around the whole time and were able to relax and enjoy their stay - after all you've travelled halfway round the world, what's a couple of hours in the car to everyone else? Out of season a holiday let could be reasonably cheap as well.