Too many things can go wrong when you know what you are doing and in your case you can multiply that 10 times since your experience level is very low.

Take that percentage of the lot to get the sqft of one floor then multiply by the number of floors you are looking to build.

However, on paper you have to depreciate it based on the 27.5 years, so your metric still looks good, but you took money out of your pocket to cover the cost.In my opinion, the only 2 "real" metrics, since are not easily manipulated are: gross rent multiplier at the time of acquisition and cashflow including principal pay down.  

Again, I can't tell you the exact return by year without seeing the underwriting.Equity Multiple 1.94 - take your equity invested and multiply it by 1.94, this is your total return including the cash on cash throughout the deal, the money returned from loan proceeds if there is a refinance and lastly the proceeds received after selling the property in year 5. 

Income:$3,800 Gross Monthly Rent CollectedExpenses:Management $380 (10%)CapEx $228 (6%)Repairs $150 (4%)Vacancy $304 (8%)Wind/Hail $200 (5%)Property Taxes $200 (5%)P&I: $1,900 (50%)NET PROFIT = $450-500/MonthCash on Cash ROI: 8%LOAN DETAILS:Purchase Price: $350,000Downpayment: $70,000 (20%)Amortized Over: 20 YearsLoan Interest Rate: 5%Income-Expense Ratio: 1.08%Gross Rent Multiplier: 7.68

They should be automatically multiplied times the number of months you indicate for Rehab time.  

Currently have 6 properties, 11 units in 2 years of investing.Want to grow to 75 units in the next few years and over 5000 in 10years, seek advice on what I should be doing today to see the dream become reality?Any ti...

so i multiplied monthly mortgage *12  which = my cash flow right?

We're in the process of purchasing a 9-unit property, so I'm trying to think through how all of these little things get multiplied as our business grows. 

They have gross rent multipliers.