I'd say maybe about half of my class of 60 students worked somewhere whether it was being a CNA, working at Starbucks, etc. It's definitely manageable as long as you have good time management. When school starts, school should be #1 over your job (or why else would you be there). I've had some friends that HAD to work as well because they were the sole money maker, but eventually quit working because it affected their schooling and pulled out a lone to cover the temporary costs. Actually, a couple students pulled out loans to cover basic home/personal needs while in school. They were small loans because an ADN program is fairly manageable price wise compared to a BSN.
While in school,I worked 2, 8-hour night shifts per week while in school and it was totally manageable. Of course I didn't have a social life, who did during nursing school, haha. Well, I guess our social life was hanging out together with fellow classmates at Starbucks or Panera Bread during our study group breaks. One of my classmates which I admire and have much respect for worked full time as a psych tech, had a family with 2 kids, was the sole breadwinner, and was in the program and passed with flying colors. Though, he looked dead every time he came to school and clinical. So in the end, it is manageable, but you need to make sure nursing school is #1 over your job.