Multiply that by 10 or 20 or 50 and you can see why so many landlords took it in the teeth in 2008 and beyond.That's why I've been sadly shaking my head over the past two years whenever I'd see folks do deals with a whopping $68 in monthly cash flow.

These are the ones I would focus on, but there are several more metrics you will learn as go along including Gross Profit (on wholesale and flips), Return on Investment, Equity Multiple, Pay back period, Gross Rent multiplier and more...

Do I calculate an average monthly income using all our income (salary and commissions), and then multiply by 250%?

The n is a multiplier which is the number of years you have occupied the property.If this is your forth year as a tenant, then the number works out to be $50*4 = $200.If this is your first year as a tenant, then the number is just $50*1 = $50.This is then the amount you can deduct from your rent for a period of say 60ndays or longer (until the eviction suspension is lifted) IF you pay the reduced rent on time.

If you cant multiply a $750,000 x 6% (.06) in your iPhone you have bigger problems.  

Now multiply this if you own 5 properties ... its exponential. 2) If a flip can make you 20K maybe holding it makes more sense, (go for appreciation - cashflow) If making 100K make more sense to cash out at the moment?

Buy one house, fix up and flip, then continue to multiply.

  $1,000 yearly premium multiplied by that 12% means $120 each year that it is renewed. 

.** Purchase & Rehab **Purchase Price: $117,000 ($106/sq.ft.)After Repair Value: $165,000Purchase Costs: $585Rehab Costs: $11,286 (75% Financed)Down Payment: $32,072Total Cash Needed: $32,657** Financing (Purchase) **Loan Type: AmortizingLoan Amount: $96,215Loan to Cost (LTC): 75%Loan to Value (LTV): 58.3%Loan Term: 30 YearsInterest Rate: 5%Monthly Payment: $517** Holding Costs **Holding Period: 2 MonthsLoan Payments: $1,033Recurring Costs: $414Total Holding Costs: $1,447 ($724/month)** Refinance **Refinance Loan Amount: $123,750Refinance Costs: -$4,950Purchase Loan Repayment: -$95,983Holding Costs: -$1,447Refinance Cash Out: $21,370Invested Cash: $32,657Refinance Cash Out: -$21,370Total Cash Invested: $11,286** Financing (Refinance) **Loan Type: AmortizingLoan Amount: $123,750Loan to Value (LTV): 75%Loan Term: 30 YearsInterest Rate: 4%Monthly Payment: $591** Cash Flow (Monthly) **Rent: $1,200Other Income: $75Vacancy: -$60 (5%)Expenses: -$255 (21%)NOI: $960Loan Payments: -$591Cash Flow: $369** Returns & Ratios (Year 1) **Cap Rate (Purchase Price): 9.8%Cap Rate (Market Value): 7%Cash on Cash Return: 39.3%Return on Equity: 9.2%Return on Investment: 277.6%Internal Rate of Return: 277.6%Rent to Value: 1%Gross Rent Multiplier: 8.13Equity Multiple: 3.78Break Even Ratio: 70.5%Debt Coverage Ratio: 1.62Debt Yield: 9.3%

This will help you stay on track by finding inefficiencies and eliminating them and finding strengths and multiplying them.