I live in south west too and I do all the servicing of the 350z myself as i dont know of any specialist round here that I would trust to do any work on it.
At the end of the day its pretty much the same as any other car if you change the oil and filter, air filter, plugs etc etc it should be very reliable.
And should just add, if you have any issues this forum is the place to come as everyone is very helpful.