I couldn't find any classes offered by extension on hydroponics or vertical gardening. There is information available online from university sites. These can help, since university information is research based, and is not trying to sell you products or services.
I am going to contact MSU and see what classes may be available. I will update your question when I get a response from the school.
You may want to check your local garden clubs and hydroponic supply stores to see if they offer classes or seminars. You may have already looked at the following possibilities but, I will include them here for completeness: Your library is likely to have books on the subject. This topic has been featured on television garden shows, too, so the websites connected with those tv shows may have online videos on the subject. For example, 'Garden Smart' and 'Victory Garden's Edible Feast' are two shows that have discussed hydroponics and vertical gardening. Look in your local publications, like newspaper, community newsletter, or 'Michigan Gardener' to see if classes are offered.
The MSU Bookstore offers a publication on Hydroponics you can order online:
To search for university sites that have info, enter a search similar to this:
Hydroponic growing site:.edu
The inclusion of the 'site:.edu'. On the end of the search will give you mostly university sites that are research based. (A few commercial sites still get their ads in the results)
Here are a couple extension publications, if you would like to start there:
When I receive a reply about hydroponics and vertical gardens I will post it to your question here. Thank you.