Yep every baker knows that for moist cakes, biscuits, even pancakes, buttermilk is the way to go! Nothing else makes things quite as moist. Funny how I hate the taste of buttermilk by itself but love, love, love it in baked goods. There are other ways to moisten breads etc but in my experience nothing beats buttermilk.
No, I thought it was easy before my back went too. It really is hard work but I love it so much that it doesn't seem like work, or it didn't before anyway. I always wanted to open my own restaurant/bakery and seriously looked into it in the early 80s. The only reason I didn't was because of the horrible profit margin. As much as I love to cook and bake I also didn't want to kill myself in a business that so rarely makes a decent profit. I opened a flower shop instead and did quite well. A lot more profit in flowers. Well at least there used to be.
Yeah, if I ever open up my own shop, I'm thinking less perishable items are the way to go. I'd love to sell my soaps in a shop, or get a high enough price for my art that I can make any kind of profit in a gallery. But the thought of baking all that stuff for possible sale, and throwing it out at the end of the day, freaks me out.