Considering a Service Dog for Seizures: Need Advice

I feel that a service dog would be extremely beneficial to me. we've already determined that whatever is causing my seizures can be alerted beforehand with a dog that knows the signs. the problem is I have no money and I don't live alone (my mom doesn't want any more animals in the house). I'd have to research the best dog breed for the job, see if I can get one for a low price, then train it myself if I don't wanna go into severe debt and possibly even travel since there's no service dog trainers near me. Ive never trained a dog even for simple tricks but I know there's a lot of misinformation about training methods everywhere... if any of you have trained a service dog yourself could I maybe get some preemptive tips for if I decide to go through with this??