I work full-time, go to school full-time (online), have 3 kids in activities, and my husband works 2 hours away so I'm basically a single parent during the week. I don't pay someone to clean my house because it really doesn't take that long if it's kept up with. And my kids help! My husband also helps when he is home.
We don't have the ideal situation and it might take me nagging to get my husband to help, but it gets done.
I can't imagine paying someone else to do it - though sometimes the thought is really nice!! I've heard only horror stories though and don't want anyone in my house when I'm not there. Plus, who will really do a better job than I will?
The floors don't need hand and knee mopped on a weekly basis. Keep them swept daily and mop once a week.