More young Americans are turning to trade school to pursue in-demand jobs like plumbing and electrical work but encountering something they didn’t expect: hefty price tags.   Demand for training in blue-collar fields is booming as skepticism over the value of a college degree grows. On social media, videos touting the virtues of blue-collar careers are racking up views and spawning hashtags like #nodebtneeded. But as free and low-cost routes like community colleges and union apprenticeships fill up , more students are turning to more costly private options, where tuition can run into the tens of thousands of dollars. A nine-month cosmetology program in New Jersey, for…