Beyondtherainbow - Christina is the most awesome cleaner and has a lot of tricks to making things easier on you.

I get that your space is small so one thing out of place makes it look messy. We have an open concept house and it's small so one thing out of place makes the whole place look messes. Add 2 kids, husband dog and cat and it's a handful.

Do what Christina said break it down to 15 minutes sections. Since I can't stand for to long the 15 minute session is what I do. I do it a little differently but it's about the same and it works.

Good luck and try not to stress. enjoy your time with your brother.