A community college is usually cheaper, and they have a good program, it may serve you better. Does UNOH have a 4 yera program for diesel? If so, your community college to start and then UNOH for the last two years.
I now hire degreed professionals, but a number of years ago, I was over 150 skilled tradesmen, most of whom were required to have state certification. I was not as concerned with where they obtained their training as I was about the certifications and license (electicians, plumbers and HVAC) and of course their work ethic.
Maybe you can find what employers in your area prefer. That is who will be making the hiring decisions, thus job availability. Their preferences are not scientific - just their preference.
My dad retired as the Dean of a community college running their votech programs. I am so disappointed that so many community colleges have done away with their votech departments. Not everyone will obtain a college degree, and not everyone with a college degree gets work nowadays. But learning a good trade and obtining whatever certification is available is a good path to be on.
Good luck on your journey!