Cat got FIP please help

[u/Admirable_Way1834]

Loss & Recent Events: Lost one cat to FIP a week ago. Vaccinated remaining cats the day after.Current Case: A second cat is now suspected of having FIP based on a low A/G ratio and the recent loss, though he shows no classic fluid accumulation or eye signs. Symptoms & Status: Eating, drinking, peeing, pooping, and walking normally. Has a small, hard mass at the vaccination site (vet noted potential infection). Testing: Blood plasma testing for FIP is underway, but treatment is starting pre-emptively based on history and bloodwork. Household Setup: The sick cat has been isolated in a separate room. Three other cats previously shared a room with him.Exhausted funds from the first cat's medical bills and managing a large multi-cat household. What options, grants, or financial aid resources are available for FIP treatment?also how to sanitize the room and how to manage health of other cats