I have been wanting to grow a cherry tree and your ideas are great and I am going to try it. When I grew my first apple tree, I made a hole bigger than the I needed, put liquid fertilizer in and it grew great, but no apples. 2 years ago, I got lots of apples and were excited, but this year I had lots of flowers, but no apples. I realized I probably should have been watering more. I bought me some comfrey seeds and will be planting underneath the tree this spring. I also have clay soil.
I have a pear tree and another apple tree I started and thought died, but noticed some new branches coming up. I will be pruning the old growth off this week and get the new started and water this winter when needed.