Of all those things - the tattoo appointment is not a necessary expenditure right now. I'd work on the others and maybe re-schedule the tattoo appointment for a later date.
See if you can find a spay and neuter clinic that has more affordable spay and neuter - and please don't declaw! I used to - until one of my cats feet were messed up for life. Declawing is really amputation - they amputate off a digit of their toe. She walked in pain for the rest of her life. My two cats now are not declawed, I got an affordable scratching post and keep it catnipped up and I don't have problems with them. I also clip their claws every two weeks which cuts down on their desire to scratch furniture as well.