Depends on your market, of course, but you shouldn't be rehabbing something to have a 100 gross rent multiplier. 

If the houses are too different or sold too far back in time, then try to find the $ per square foot for near and recent sales then multiply by your square footage.

Gross Rent Multiplier  Sold price divided by gross rents. 

It’s a calculator that has a library of pre-configured financial (and other) calculations that are categorized into groups:Real Estate (Property Calculator, Mortgage, Gross Rent Multiplier, Cap Rate)Business (Depreciation, Breakeven)Finance (Time value of money, Commercial Leases, Loans, Cash Flows, Auto Lease)Investments (Bonds, ROI, 401k, IRA)Construction (Drywall estimator, crown molding angles, stairs)Conversions (Date, area, length)There are many more templates available in the app than what I have listed above.

Same blessings...same burdens...multiplied by 2.5 - 7.5 times.

Elmwood village is great but a little pricey for me at the moment, thinking about West Buffalo as well close to Richmond but not as familiar with the areas enough to feel confident (I know it's going into a Renaissance mode but like any city, has its good and bad pockets)For 2016 I plan to buy at least 2 more properties, ideally 1 as a flip and 1 SFH rental, then continue to multiply my output moving forward.Any suggestions, insight, tips, or contacts would be much appreciated, may you all have a wonderful and prosperous day ahead of you.Best Regards,Derek Browning

Regardless of the stated taxes I use the sales price multiplied by 80% multiplied by .0285, or whatever your mill rate.

The value was based strictly on a determination of the square footage value multiplied by the sq. ft. of my house. 

.** Purchase **Purchase Price: $ 75,000Purchase Costs: $ 1,500** Cash Flow (Monthly) **Rent: $ 850Vacancy: 8% (-$ 68)Expenses: -$ 338Net Operating Income: $ 444Cash Flow: $ 406** Returns **Cap Rate: 7.1%COC: 7%Rent to Price: 1.1%Gross Rent Multiplier: 7.4

As long as you think it will take, multiply that number times three and add a little change and you're close to how long it will actually take.