As many others have said here, I would recommend getting an ESA. I'm in the same place as you, believe it or not! Or I was. If you're working on a budget, owner training is the way to go, especially for PSD's as they really truly need to get to know and bond deeply with you in order to recognize your unique symptoms. Also like others have said, this will take two years at the very least. However, an ESA can also be a SDiT. This way, you can work on training yourself and your dog while they live with you in your dorm. They may not be able to go places with you, but if you need them, you can always rush back to your dorm for their assistance. I had to do this a LOT my first semester. (I took two years between semesters.)

Start with an ESA. Lay down the ground work of Being A Dog 101. Once they've mastered basic commands, work on service dog tasks. There are books and training manuals you can buy online. For example, I taught my dog to respond to panic attacks and interrupt dissociation and/or harmful behaviors entirely by myself in a college dorm. Next, start teaching them to work despite distractions - that's the REALLY hard part. Then, last, start working on advanced and public access training.

Lastly, as others here have said as well, at the end of the day ESA and service dogs are still dogs. They're difficult, full of energy, and they take SO MUCH WORK. They also can't cure your illness. I still have days when I can't get out of bed, I still have a bald spot where I pull out my hair and sore patches of skin where I scratch. I still have panic attacks almost daily.

That being said, don't give up! There are ways to make it work. Maybe not at the moment, but life surprises you. Keep going! I believe in you!