Excellent write up there young sir.
You do not need to be 90 to get your farm started. If you can get over to Halfhill in 4 winds then you can get the 4 plots running. Which is great for getting your alts bringing in ingredients.
It's not a Jade hare - it's a Jade cat
Should also mention that as you progress up through the Tiller rep ranks you open up more farming plots, until you get a total of 16 plots. When you complete the quest to open up each extra plot, you will need to wait 15 minutes from when you return to your farm for the plot to become available. You will get a debuff while the Tiller clears the plot for you to use. I believe these extra plot quests only become available at level 90.
Talking to Jogu the Drunk at the pool by Halfill market and paying him a varying daily amount will net you info on what seeds to plant. These will net you an extra 2 crop per plant. Normal crop yield is 5, so that is 7 if you take his advise.
One other thing to note is that your farm resets at 11pm, and all the dailies reset at 3am UK time.