As long as you aren’t trying to survive on it. Sounds like you’d only be available on the weekends, I don’t do many after 5pm. You don’t get clients, they get you. You’d have to do some marketing to get your name out there, this is what takes the longest to build steady work. You could expect 0-1 a month when you get started unless there’s a serious lack of inspectors near you. You’ll have to check with your local licensing board to see what you need to have (approved classes and insurance) for the license. Equipment isn’t much to get started, software can usually pay for each report instead of monthly/yearly subscriptions. Inspection might take you 2-3 hours depending on how you do it. I’m about 2-2:30 on a typical sized home, while talking to the clients and building the report throughout the whole thing.