Bshipper

Hi everyone,
My names Brian and am looking to get into this sport. I have a very energetic Wolamute dog and it's hard to give her enough exercise. I also need to exercise more so I'm thinking it's a win-win situation. We will need to get another bike in a few months for my wifey, she's pregnant now but wants to be able to exercise afterwards but she's had asthma her whole life but cycling seems to be safe for her. Cycling sounds great because we're able to get outdoors to exercise. Gyms are too expensive and you are inside the whole time. I currently don't have a bike but have been looking around for a week and reading and trying to learn what to get on a very low budget.
Thanks