I don't know about those bikes, but I'm here to give you some positive feedback anyway!

It sounds like you're doing an amazing job. I don't have children, but I've watched some close friends have them, and I see how hard it is. That you're finding time to run a business without any help with the baby, well, I'm in awe! One of my best friends runs her business from home, has a full time nanny, a husband who does a lot of the paperwork, a mother who comes a few times per week to help, and she couldn't make it to the gym for the first year! And, no, she's not lazy. She has boundless energy so I know if she can't find time, there's NO TIME.

Buy your bike, have fun riding, and try to enjoy yourself. Your body has been through huge changes, and will eventually bounce back.

You rock!