I wouldn't buy the castle. The rest is up to you.
add another vote for the vineyard :-)
I think the Vineyard is winning in my mind as well, just don't tell Pinkster.
I'm a fantasy fan so I am saving for the castle (8.7 more million to go...) but it does indeed look a bit tacky. I love the vineyard but I also like the little dome on the mansion (and, psssst, I think it looks way nicer than that villa that cost 70something gems)
But recently new coin items all cost 5 digit sums so most updates throw me back quite a bit. Plus new crops for tiny amounts of money - I think I'll be working towards that castle for a while longer.
I like them all! I think the Vineyard.