Thanks again, all.
Back in internet land now!
I suppose what I'm looking for is work that I can do when I want to, but can put off a bit if I don't have time / am not in the mood etc. It still sounds like woodland is best for this - and it's where I want to spend my time / what I enjoy. To start with, anyway. Not bothered about tidy (apart from perhaps a more formal garden close to the house) so that helps. I will eventually no doubt get a polytunnel, veg patch etc. and find time when necessary. Better than watching the junk on TV anyway! But I probably won't get animals, apart from previously mentioned dog and perhaps a cat for the wife!
Cheers.