If I multiply that by 12 I get $3,000 in cash flow per year.

Last 3 columns shows how the CoC varies as % rent varies.Here's the equation if you want it:NOI - Mortgage / DP = 15%[50%*(PP * % Rent * 12) - (75%*PP * $5.37/$1,000 * 12)] / 25%*PP = 15%This reduces to:[6 * PP * % Rent - .04833 * PP] / 25% * PP = 15%PP cancels out, multiply the top by 4 (or divide by 25%) gives you24 * % Rent - .19332 = 15%Move the constant and divide by 24 gives% Rent = (.15 + .19332) / 24 = .34332/24 = .014332 = 1.43%Given a 25% down payment (ignoring closing costs and reno), if rents are 1.43% of purchase price, you achieve a 15% cash on cash return assuming the 50% expense rule.

If the past is prologue, by funding a Homeowners Refinance Act, similar to the one used during the Great Depression, we could multiply the effectiveness of the current Bailout Plan.

The appraiser would adjust according for the monthly rental amount based on features, amenties, condition, location, and proximity to determine market rent and apply the most resonable GRM to your gross monthly rent.So for instance if your market gross rents are determined to be $3000 (750 per unit X 4) and the GRM was 75X then your 3000 would be multiplied by 75 to end up with a market value of $$225,000.Cap rates are great but no residential appraiser uses CAP rate, you can however use it for your "own," analysis to determine your ROI criteria but it has no bearing till you enter 5+ multi family, commercial, retail, and business financing. 

I can't help but imagine what buying power $200-$300K would give me to multiply my portfolio.

They take ARV multiply it by .7 and deduct rehab costs to get their purchase price.  

Try using  the cost per square foot of a similar home, and multiply that by the square footage of your home to get a rough value.

For what it's worth, I calculate my maximum price (all-in) by dividing the median rent for the area by 0.017 (59 rent multiplier, in other words).

By the way, for anyone reading who's not familiar with Michigan property taxes, the way it works is you multiply the millage rate times the Taxable Value.

Depending on what mechanicals are there multiply that by at least 4.