Public Transportation in Nepal usually employ conductors to tell people of its route, but in super busy locations like Sundhara, it may be possible that the visually impaired people may miss the bus. So, a proximity detection technology will definitely help.
I think implementation of this would very much be feasible. Step 1 - once your pilot with Sajha Yatayaat will be completed, you would have results and statistics to show the true value of your application. With that, you can talk to the policy makers to make policies around it so that the bus owners would have the beacon installed on their own expense. All government needs to do is a means of checking and monitoring that the devices have been installed, and that can be done by traffic officers using their mobile. Looks very feasible. To have the installation, it seems like the money the bus drives have to spend would be around NRS 3,000. Doesn't seem like it would have a big pushback from private driving companies either..
And about implementing it in the hospitals, probably it would be a good idea to engage college students into doing that with collaboration with the hospitals. They will have your pilot project as a baseline, and your team can serve as mentors too. This way, the implementation can expand quickly, and hospitals probably won't have problems with it since this probably doesn't have to be integrated to their IT infrastructure to pose any data security issues.