My company offers generous leaves of absence, and in the US there's a law called
FMLA that protects your job while you're on medical leave. Now cosmetic procedures generally don't qualify, but see if there's other things you can work on during recovery, for example back pack that can be helped by PT. Note, this is an unpaid leave.
I'm fortunate to be able to write computer code, which if you have an inclination for, you can pick up and become pretty good at in about a year. So if the FMLA thing falls through, I can work remotely.
But the larger question is,
how do you pay for CLL? Having a job is only *one* option. Getting loans is another. In the US for example, SoFi offers 7-year loans up to $100k with 10% APR interest. Realize that $100 is way more important to you now, than $20k / year over the next 7 years. You can make that happen much more easily than producing $100k right now. For example if you invest $10k in a basket of promising cryptocurrencies and the 2017 pattern repeats itself, you're set.
Back to jobs - nowadays, there's a lot of work that can be done remotely.
https://remoteok.io is a really good site to find remote jobs. They tend to be centered around IT, though there are some other areas as well:
Anyway, there are
25+ other sites for finding remote work - check them out.
The even larger question, is how do you reduce the cost of living & CLL? One answer is to live in an area with a lower cost of living, during CLL if your doctor is there, or during the recovery.
NomadList.com has a lot details on many cities in the world - cost of living, healthcare, walkability, quality of life, safety etc. Moving might be a big "move" so to speak, but CLL is an even bigger one, and when people make a major change, they tend to be more open to make other changes following it. If you quit your job to do CLL, moving to a place with low cost of living and taking remote gigs can be a reasonable things to do.