Depending on how mobile your mother still is, I'd also suggest thinking about learning transfer techniques from a physical therapist. My mother is now virtually immobile and needs complete help to get in/out of bed, sit down/get up, etc. It can be very difficult to maneuver the dead weight of an adult body, and can be dangerous to the caregiver's back.
I also don't think there is anything remotely wrong with being compensated for your caregiving responsibilities. There are opportunity costs involved for you that could impinge on your ability to meet your financial obligations to your *own* kids. I'm the sole breadwinner in my household and there is no way I could just quit my job to spend my time taking care of my mother, as much as I'd like to help her -- to do so would be shirking my responsibilties to my son.
Further, the caregiving responsibilities often land more heavily on one adult sibling for a variety of reasons (time flexibility, geographic proximity). When my aunt ended up as caregiver to my grandmother, my father and his other siblings who lived further away from my grandmother all chipped in to pay their sister for all the extra work she was shouldering. She really appreciated that.
Good luck to you!
D.