@RakeshJoshi there Pratyaksha Pramana is working. Sai is not mentioned in any Purana. But people are getting their wishes fulfilled after going to Sai temples.
Puranas must be referred. Don't say everything is interpolated in puranas. Swayambhu idols have no prana pratishta ritual. So, if wishes are fulfilled, then idol must be swayambhu
@RakeshJoshi yes. But temples will be full and it's not quite possible. Instead i can meditate on shiva for sometime and read his stories. I'm planning to start Upanishads.