Thank you!
I also am curious if replacing my thermostats and water pump while I'm at it would be good preventative maintenance, or isn't really needed at the moment? (I have a 2002 TJ, so it's 15 years old)
I still am young, so I am not sure if spending money on preventive maintenance outweighs saving money in general.
Do them at the same time, especially if it's 15 years old. The thermostat and water pump aren't that much more, so it would make sense to just do it all at once (when you can afford it), so that way you've got a brand new cooling system that's good for at least another 10+ years!