If you are not a bike mechanic by profession and are doing the DIY truing on your own bike at your own home, yes, truing does take about an hour or two, which isn't too bad.

Baby steps. 3 spokes at a time. Yes, you should be able to do it, with the help of zip ties, because I was able to do it successfully. If it does take time, so what? You will probably true the wheel once in an year or two years.