as said before, once prices of film hits the roof and becomes more scarce, there will be plenty of cameras hitting the streets. people will be selling cameras as mantle ornaments and making lamps out of them.. parts won't be the problem... finding someone to work on your camera will be more of an issue.
learn to do your own repairs on what you have. its a nice hobby that will keep your photography hobby alive.
As long as people keep using film, there will be a profit motivation for companies to make it, so I am not sure why you think you have some secret handshake like insight into this.
Also, saying learn camera repair to keep a hobby alive is a bit off the mark here, like me, Early Riser depends on film and film cameras to make a full time living, hence our expertly considered and crafted replies.
I think we will be fine, sure it will change and prices will go up, but they are still dirt cheap right now so we have a long way to go before it starts looking unaffordable.