Hi.
I can’t give you specific advice about the field you want to go into or the value of a degree from that university. But:
1. I would definitely try to make contact with someone who is currently doing the job you want to do. (And, if possible, you would like to talk to more than one!) They can tell you about the value of the degree, and so on.
2. In my opinion, 28 is not too old. 48 is not too old. I knew someone who had been teaching primary-school for a dozen years, and got fed-up with it. She started over, and went to work for a national fashion retailer. When she interviewed for an entry-level position, they looked at her resume, with her BA in English and an advanced degree in Piano, and told her she was WAY overqualified for this “starter” position. She told them it was what she wanted to do; they gave it to her. She was older. 28 is not too old to change careers. The girl who lived across the hall from me in college got her BA in biology, went to work in a pharma lab, and hated it. She was about 28 when she quit and took a job managing a store of THE LIMITED.
3. It’s not such a bad time to go back to school, but this is a terrible time, at least down here in the USA, to be looking for work. 1 in 8 Californians who are looking for work, can’t find a job. That’s terrible! I don’t know how bad the economy is where you are, or are expecting to be, but you might just want to make sure that your future/finances are secure before dumping a stable job that gives you some security.
Good luck with whatever you choose!
Steve.