My uncle has hernia. do we have to worry if we can't have him undergo operation yet due to financial circumstances?

Yes have to, : Leaving alone a hernia has potential complications like incarceration , obstruction, strangulation and gangrene of bowel, if untreated even death, hernia repair is low risk, relatively inexpensive procedure, encourage him get it repaired , if no insurance try to get medicaid, or go to city hospital, hope you will convened him.

Depends: It depends on the sympts the hernia is causing along with the size and location of the hernia, as well as the length of time the hernia has been there. Some people have hernias for years without problems. I would see a general surgeon for a consultation to determine an appropriate plan.