Help with upcoming vet visit

I have 5 wonderfully different felines. Each have been there for me for years. I rescued 4 of them from either neglectful homes or extended shelter stays. One I got as a gift from a friends litter. This year I am struggling to pay all the bills. Last year my fiancee lost his job and I don't make enough money to support all of us. we fell behind on many bills but the cats' well being was first. We made sure they had full bellies every day and sacrificed other less necessary things. (Thank god ramen and mac and cheese are cheep!)

My cats' names are Nibbles (black cat), Cinnamon Bunn (Maine coon mix), Gnocchi (dark orange), White Cheddar (light orange), and Frin (short for Frinault cheese) (white cat)...all food related lol

The good news is that my fiancee has started another job and we are in the process of getting back on track. We do have an upcoming yearly vet visit and we need some help to afford it. The cats will be getting their yearly rabies and FVRCP shots and check-ups. Just that alone is pricey but WORTH IT! One of my cats is a maine coon mix and he has started to loose the fur around his butt and back legs. I am worried about that and hope it is just due to his age but that could be a bigger expense if it turns out to be something more than age or stress. (I will upload a photo later to show what Bunn looks like now)

Please help us to be able to provide them with the proper vetting they need and to help with potential extra costs. Thank you and many blessings!!!