I manage the finances for my mom, who's been in a type A CCRC for 4 years now. A lot of the typical bills are consolidated into the monthly CCRC payment. Things like food, transportation off site, hair stylist, etc. are variable discretionary add ons. And of course, all the housing related utilities, taxes and maintenance are built into the bill. Additional bills for my mom are cable package and internet. I keep a car that I pay expenses on in her assigned parking spot, so I have something to drive when I visit. She doesn't drive anymore or have car related expenses.
If you wanted a rule of thumb, I'd take the recurring monthly CCRC bill amount and add $1000 for incidentals.. That's my mom's budget and it works out without her having to scrimp. As an example, her monthly CCRC bill is usually $6500 with typical incidentals and then add $1000 additional to pay for cable, internet and buying whatever. Most of her shopping is Amazon deliveries that I order for her.
Additionally, make sure you understand how your medical insurance fits with CCRC services. In particular, how the rules work for time spent in facility skilled nursing and for moving from independent living to assisted living. You can run up a bill there if you don't follow the rules.
An additional expense is that type A life contracts have a pretty hefty entry bond. My mom paid ~$400K. The bond is 75% refundable when you leave (die), but it has no investment return imputed while they hold it. From what I've seen, the amount of bond for entrance varies among facilities and contracts and you have to account for the bond in the total cost. Usually a lower bond equates to higher monthlies, all else equal.
CCRC isn't cheap, and there are some pluses and minuses I've noticed. But it is the best option IMO when you're not moving in with family when you need support. I anticipate a CCRC being in my future, but hopefully 15-20 years off.