For this reason, maybe a handyman / jack-of-all-trades will have less wear and tear on their body? Diversity in tasks could mean a week of concrete followed by a week of cabinets, then a day or two of building a staircase, three hours of adding a new receptacle, and then two days of painting? Although in some ways, a handyman's job might be harder - they should be a quick learner, have good support / contacts in specific trades, and it might require better/more marketing to get customers.