Your best bet is to follow all regulations. One fine from the EPA and you could be out of business before you get started. Stick to jobs where you don’t have to worry about reclaim like house washing. You can always get into it down the road. Reclaim systems aren’t cheap. Although, you can always just get a cheap pump, block off the street drain, and pump it into the landscaping. That’s not always possible though and then you’ll have to reclaim it.
You must live in a large city.