Expenses: What are the operating expenses, including taxes, insurance, maintenance, and reserves?

I use Stessa for accounting, I love it, it links right to my bank account/credit card accounts and I can assign purchases to different properties and units of the property for multi-unit properties and at the end of the year I have a simple report to give my tax professional 

Quote from @Daryn Gardner: I recently purchased a tax deed property.

Great tenant but property tax increases have reduced my cash flow.

This was a few years ago, but at that time as I recall they were looking to do more long-term property leases over owning properties and doing pretty landlord friendly leases where they would do repairs and even pay property taxes. 

I purchased the property at a tax auction.

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

Deduct NEW property taxes after you buyDeduct home insurance costsDeduct maintenance percentage, typically 10%Deduct vacancy+tenant nonperformance percentage(we recommend 5% for Class A, 10% Class B, 20% Class C, good luck with Class D)Deduct whatever dollar/percentage of cashflow you wantNow, what you have left over is the amount for debt service.Enter it into a mortgage calculator, with current interest rate for an investment property, to determine your maximum mortgage amount.Divide the mortgage amount by either 75% or 80%, depending on the required down payment percentage - this is your tentative price to offer.If the property needs repairs, you'll want to deduct 110%-120% of the estimated repairs from this amount.Be sure to also research the ARV and make sure it's 10-20% higher than your tentative purchase price.As long as the ARV checks out, this is the purchase price to offer.It is probably significantly below the asking price.

why would a tax bill wipe out your equity at 60% loan to value?

Don't forget your taxes on a sale!