To echo what's already been said by some, your cash flow potential will be a function of your debt service, if any.

I got a Bachelor's in Finance so the valuation stuff has been a lot of fun to review.I also checked out the meet up function on biggerpockets and have already signed up to a cashflow seminar in September and a REIA meeting later this month! 

@Tiffany Wellsif it is a functioning, producing  multifamily in Jacksonville Florida not in 32209 it will likely be redeemed.

I'd be happy to function as broker on any acquisition you're considering, but my management is swamped right now- we have more work than we can handle as far out as we can see.

Both examples, are from 3 years ago (2015) and start with the same rent (for this example it is a unit with $2K rent in 2015):Rent Controlled 3% annual increase: $2000 * 1.03**3 = $2,185/month after 3 year (after the 3rd annual rent increase)San Diego non rent controlled actual average increase (which has averaged just under $500/month increase in the last 3 years for SFR): $2,485/month.That is $300/month ($3,600/year) difference in only 3 years time.You could do a tenant buyout of the rent controlled unit but the cost typically is a function of the amount the rent is below market. 

Purchase price: $95,000 Cash invested: $55,000 Sale price: $215,000 Pre-foreclose, elderly person living in the house in a extreme poor condition , we offer alternative for his living , We help the owner with a better place to live , we help the bank by giving them Money for a deal that will take a lot of money to be back and functional , we hale the neighborhood by eliminating a house that was a close to tear down and in a bad shape , What made you interested in investing in this type of deal?

Nobody cares about functionality, HGTV say that's what a shower HAS to look like 😁

@Thierry Lemercier I am not familiar with Avail's functionality, so I can not do a comparison. 

Different codes vary, but generally it means that it has to have a functioning roof, walls, doors, windows, kitchen and bathrooms.

This question is very basic, so you are best off using the search functions to sift through the forums as this topic is covered countless times.