Hi E.,
The only reason I would move away from baby food- especially if it comes in a jar, is that at 12 months, she might really enjoy the variety of taste, color and texture. It is also better for her system to take on the fiber of raw vegetables and fruits.
In terms of care takers, one of the great time savers for me was a hand held blender. I would steam vegetables, or cook them, and then blend them. That way I could control the amount of crunch or texture, if you will, my kids were getting. I could make 8-10 4 oz pots of vegetables, either mixed, or individual, and have them in the fridge. The sitter could feed them right out of the little container, or warm them up with something else. (But don't heat plastic containers with veggies in the microwave!) And homemade veggies freeze well! So you don't have to cook everyday.
Your child gets better variety, far less salt, and it is cheaper than buying the stuff from the store.
In terms of the competition, eating foods by 12 months won't get them into college. Neither will early potty training. Children develop as they need to.
And, Frankly, I would put a total stop to the cookies and prezels. They rot teeth, hurt their metabolism, and stains their taste for good foos over the long haul because those foods are FILLED with corn syrup, modified startches, trans fats and artifical flavors and colors, not to mention salts.
She is your child. It is great that a neighbor and friend can help out. SO, sit down with this friend and read through the ingredients. Talk about what you want for your child, and ask her to help you make it happen.
Good Luck! Sounds like a bit of a sticky situation.
M.