Hi Tim.
Consider hiring a trainer qualified to train dogs for disability training. Why?
A fully trained service dog usually takes 2 yrs. to train. This includes skills and public access. With many evaluations for suitability along the way. Half the dogs at facilities flunk out. A true service dog meets a very high standard. That's why they are so expensive.
Not sure what your goals are. Maybe you just want a house dog to help you out. If that's all you want, than don't read any further...But...
I've seen many so called service dogs that should not be out in public. I've read stories about them in the news.

Another thought, as related to epilepsy, alerting, up until recently an untrainable response, is not enough according to the ADA. (Americans with disabilities act) it states the dog has been trained skill(s) related to your disability. Note the "s". More than 1. When someone ask you, you need to be able to describe at least 2 skills and might even need to demonstrate if you go to court - say challenging a business who denied your rights.
Might you consider a "go fund me " page?
How about a plea to your church for donations say for a certain pass the plate in your honor.?
Can you spearhead s community campaign with say a radio station, the Vfw the Knights of Columbus, a radio station, the township? Donations at Walmart? With permission. (A family booth outside) ?
Lastly might you be able to work out a deal with a qualified trainer for a reduced rate in exchange for services?
Trade?
That's what my wife and I did.

By the way, it's a pita, taking my dog with me everywhere I go. And I have to consider places I wouldn't go with her.
See she would freak out if I left her alone. She's been trained to watch her human. She follows me around the house from room to room, watches me check the mail and take out the garbage from the window. She doesn't let me out of her sight. so if I left to go somewhere without her, she would flip out. It's not separation anxiety from the family, it's separation anxiety from me. The one with epilepsy, who she's meant to watch over.
Best of luck to you. Think outside the box if you can.

Yes I have as well. I'm going to be working on training my second one soon.

Actually I had a lil furry friend about 20yr ago a guinea pig "Max" was very rare I didn't even know what auras were till Max came. He actually trained himself We bounded the day I got him I have whats called auras it seems Max would notice a change and when he did he would clinch onto me. When people wanted to pet him he wasn't very found of them. Basically all animals have a special gift all they need from you is love and time which in our case *always* Max passed away but he will always be in my heart. Out there is a pup waiting to be adopted or even a middle age dog that you will get attached to that will have a gift. Good Luck

You can work with a trainer or trainers to get your dog ready. There is also a test to pass if you want to make sure your dog is ready.

There's a watch called "embrace" by Empatica that learns to predict seizure activity and warns others.
It's not too expensive.