Brady Jolly (right), owner of Jolly Plumbing, and his father, Barry Jolly, the company's original founder.
When Brady Jolly took over the management of Jolly Plumbing in 2014, the company — based in Wilder, Kentucky, just across the Ohio River from Cincinnati — generated a little more than $2 million in gross revenue. This year the 30-year-old entrepreneur expects revenue to reach $14...
