Nissan Pathfinder 2000 - needs new regulators for doors

we are looking at a used Pathfinder. the only problem with the vehicle that we see is that the windows don’t go up or down. I have googled this problem and learned that models around this age often have problems with their regulators. Is this something we can fix ourselves with a little help from a guy who is pretty competent around cars?

If you can aquire the replacement regulators, and if this guy knows how to remove the inner door panels to gain access to the regulators, sure! You can fix it yourself.

Tester