My cat stopped eating

https://www.reddit.com/r/CATHELP/s/sdhPPYPjbt

I really want to take him to vet but I dont have enough money. I dont want to lose him, he can still stand and is able to drink but he doesn't want to eat. His head is shaking and bit I think its because of ear mites, if I take him to ear cleaning will it be able to solve the problem?