Contact the ALSA. One thing he's going to want soon is something to help him communicate. They may well have a loaner machine for him to use.
Many with bulbar onset survive years with their disease and adjust fine with the PEG and bi-pap. Those things will help him--make him feel better as he'll be properly nourished and have adequate breathing support.
If he hasn't applied for SSDI/SSI he should immediately. It's approved automatically in cases of ALS. If he was in the armed forces--they have also approved it as a service related disability.
It takes time to adjust to this diagnosis. Expect mood swings and let him talk about how he's feeling. I'd suggest getting all advance directives and such in order -- as any responsible adult should consider regardless of health.
The folks here will be able to answer any questions you come up with during your time with us. We all want to welcome you to a family no one wants to be a part of. Still, there are great people here--and we'll be here for you, your dad and anyone else in the family that wants to join us.
Regarding Hospice if anyone has mentioned it to you-- get ALL equipment needed before signing up with them--beds, wheelchair, lifts, etc. Again, loaner closets have many of those supplies. A wheelchair is likely not needed -- but medicare can be slow--start the process early!
Again--sorry you need to be here--but welcome to the family.