Thanks Lily P - that's very helpful - will have a look see.
I'd love to borrow your rotavator - I could do a lot of damage with that!! Fortunately for the cat and the neighbours I have a man who brings his own when I need that sort of work doing.
It is fun (if a bit daunting at times) making a new garden and I'm doing it bit by bit. Some things I know exactly how they should be - other bits are a little harder to visualise. My OH is quite impatient & doesn't 'get' gardening so he sometimes finds it hard to understand that it is often better to let a garden take it's own shape over time - he enjoys the results tho' - especially on a hot day with a cold beer in hand!
It is only about 1/3 of an acre (much smaller & less grand than yours appears to be) but is plenty big enough for me to play in.
Would love to come and see your garden if you ever decide to open it to the public.
Thanks again for your help.