"A “pessimistic” scenario where prices now retreat by 15% to 20% could subtract 0.5% to 0.7% from inflation-adjusted consumer spending, he wrote in a blog post Tuesday."

You determine NOI, then subtract CapEx which equals the amount of cash you have available for debt service.

I've found different lenders calculate DTI ratio when it comes to rental income differently.Some lenders take rental income (or a percentage thereof), subtract the mortgage amount, and then add the result to either the debt or the income.Others add the rental income (or a percentage thereof) to income and the monthly mortgage payment to debt.So, let's say a place rents for $4000, the mortgage is $2000, I make $5000/month, and I've got other debt of $2500/month.So, my DTI without the rental is 50%.Under the first scenario, .  

You will need to find out what the comps are, estimate rehab cost, holding costs, profit margin, and then subtract the back taxes due to establish your offering price.  

One is the net operating income, which is the profit you make on the property after subtracting the operating expenses.

I figure I should get {$650.00(rent) x 11 (months (subtracted 1 month vacancy))} - {$300.00 (taxes, insurance and upkeep) x 12 (months) }= $3,550.00 profit annually (11.8% on 30K investment).

The Owner needs to have me do a w9 for them to pay me commission if I don’t subtract commission ,or even if I do subtract commission.  

This is important because the principal part will be subtracted from the $220k owed, but the interest will be added to it...and I would estimate that about $20k of the $28k back owed is interest.2 - see #1...so, the real total owed at this point would be more like $240k...assuming there is no rehab to be done.3 - Now, you need to cover this, and closing costs (no matter who pays them, they can't come out of the $240k owed (see #2).  

I've always wonder how much tax should I estimate to subtract after a flip ?

So, if the comp has one less bathroom, add say 5K to the comp's value.CBS--if the COMP is BETTER, SUBTRACT for what is better.