$100k is nice starting seed, so protect it now and watch it multiply later!  

Multiply times 1.5 and add that to the rent.

What sets you apart from the other seemingly multiplying real estate investors that like you (and me for that matter) are somewhat new to the real estate game?

Gold laboreth diligently and contentedly for the wise owner who finds for it profitable employment, multiplying even as the flocks of the field.III.

I'd multiply that annual rate times the purchase price over a 30 year period (should I use 30 years?)

Then once you find something sorta close, find the price per square foot and multiply that number by your subject properties square footage. 

(I also tried the analysis tool on the site, and the numbers looked good: gross multiplier at 7.69; cap rate at 10.39; net operating income at 9,348.00; debt coverage ratio of 1.44 at year 1; and pretty good equity).I really appreciate the help and insight.

purchase price approx 900000Closing costs approx 10776Repair costs about 10 - 20000After repair value - 1000000Monthly income currently - 5100Monthly expenses - 7195Monthly cashflow - -2095NOI - 36,715Total cash needed - 39524Cash on cash ROI : 63.62%Proforma cap rate - 3.99%Purchase cap rate - 4.08%Loan amount - 960300Loan fees ~ 50005%30yr fixedTotal cash needed - 39524Income/expense ratio .55%Gross rent multiplier - 14.71Debt coverage - 0.59%2% yr expense increase5% yr income increase7% yr property value annual increaseWhat does the gross rent multiplier mean? 

I'd pay about $890,000 for that portfolio to meet my numbers ($150/door and 15% Cash on Cash return)Here are the numbers as I see them (per house, then multiply by 27):My price:Final Offer Price 33000% Down Payment 30.00% (portfolio loan)Down Payment $9,900 Remainder of closing costs $1,500.00 (this might be high, but I'm not sure how much the closing costs on a portfolio loan are going to be)Total Due at Signing $11,400 Mortgage Rate 6.00%Length of Mortgage in years 30Monthly Mortgage payment $138.50 Taxes $45.83 (guessed at $550/year)Sewer and Water $- tenantTrash $- tenantHeat/Utilities $- tenantHOA $- tenantCap Ex and Ops $150.00 Insurance $45.83 (guessed at $550/year)Mgmt Fee $64.10 Vacancy $51.28 Total Expenses $495.54 Total Revenue $641.00 (used GRM against 1.43M to get ~208k/year in revenue)Cashflow/month $145.46Cash on Cash Return 15.31%

Also the cash on cash ROI is 13.82% and monthly cashflow is $587.25. also the gross rent multiplier is 1.67 and income expense ratio is 1.86%(2%rule) .