Cash flow logic for owner occupied fourplex

[Shamim Toufighian]

I'm hoping to purchase fourplex in Los Angeles to owner occupy at some point in the near future and have some questions regarding the unit I'll be living in and what I would need to be putting in "rent" wise. Let's say the monthly mortgage payment is $5000 and the rent from the three other units cover that. Then let's say the unit I'm living in would rent out at $2500/month, would that then be considered as part of my cash flow, meaning I would have to put $2500/month into savings? Also, what if my monthly budget to go towards "rent" is only $2000, would it be unwise putting in only $2000 towards savings instead of what that unit is actually worth?