Hello A.,
Guinea pigs are SUPER easy to take care of...you feed 'em, play with 'em, clean their cages......but just be warned. They stink to high heaven!!! Unless they are in a cage outside, or "garage type" setting (and I'm not suggesting you put them in the garage), you can smell those things from a distance!!! If you just have ONE in your house, you WILL smell it coming in the front door.
I had one a few years back. I even took to cleaning the cage out every three days....still stunk. AND, they are messy. If you desire a perfectly clean floor, not the animal for you. I would have to have the opinion that guinea pigs are only a slightly less smelly animal than a ferret.
I'm sorry to sound so "down" about them, but like you stated, you are researching and want info...I would rather you make an informed decision, with all the facts, than buying one only to have to find it a home later.
Good luck and Happy Holidays!!
Margaret :)
P.S. I had my GP for several years, (Einstein, may he rest in peace) He actually got cancer and died. I like guinea pigs. BUT, will definetley NEVER own another....unless its an outsider.