Since pod school is similar to MD/DO in that sense you can find that info on their forums. I have read that some even managed to work as nurses on weekends and around class schedule. But of course, everyone recommends not to work.
I have worked all the time in undergrad. Last 2 years I worked 50 hours per week on average and managed to get 3.86 for the last 2.5 years.
But, I am sure undergrad is nowhere close to pod school.
I think that any job that is flexible maybe can work in pod school, but any job that has a set schedule will be challenging.