The husband has stage 7 alzheimers and is total assist, The wife had a stroke and has limited use of right arm and leg but is independent. She has aphasia so I do all communication for her on the phone making appointments etc. so I speak for both of them and do all medications and all driving with my own car.
Hourly rates vary from area to area. When my Dad had caregivers a few years back, he was paying around $25 per hour for one person, he lived in a large metro area. Wouldn't be surprised if the hourly rate was now $30-$35/hr. Dad used an Agency, so they handled the payroll deductions, etc.
I wish you good luck.