Ok, here is a housing writeup for you all. In 12 hour shifts:
Brown House: 5 minutes, 6 cash, 1 xp = 864 cash 144 xp
Purple House: 3 hours, 75 cash, 7 xp = 300 cash 21 xp
Blue House: 8 hours, 150 cash, 13 xp = 225 cash 19.5 xp
Pink House: 6 hours, 110 cash, 11 xp = 220 cash 22 xp
White House: 12 hours, 200 cash, 20 xp
Orange Houe: 16 hours, 250 cash 25 xp = 187 cash 18 xp
The Caveat is, you have to cash in 144 times with the Brown house. But considering it's almost 3x more profitable over the long run and almost 7x better at xp, for me since I have it running in the background, it's worth it. To break even with the 3 hour house, you would need to check in with the brown house at least 50 times in a 12 hour period.
Another way to go about it, would be to build up Brown houses to the max. Check often, and slowly upgrade to Purple Houses. This way you don't have to check so often. Then from Purple go to Blue.