Multiply that by 75 houses and I'be losing about 3700 a month. 

Multiply that by a significant multiplier when you are evicting someone under the same roof that you see every day. 

My money is just sitting in a money market account gaining 4%-5% which isn't terrible but with a goal of eventually owning 10-15 rental properties what would be the smartest way to multiply my money for long term wealth? 

Then take your rate and multiply it by how much time you think it will take.

Add up all your bills monthly on your credit report- mortgage, taxes, insurance, auto loans, student loan balances X 1%, any other debts  and multiply that total X 12 = the amount of savings you need.IF you decide to get mortgages keep your income total to 36% of every single debt.

My philosophy is pick your most expensive capex item and multiply that by 1 1/2 times.

When eyeing multifamily investments, you’ll likely encounter two key metrics – cap rates and gross rent multipliers (GRM).At first glance, they seem similar, but there are some important differences between the two.The GRM simply divides the purchase price by the property’s total potential rental income–it doesn’t account for operating expenses.Cap rates, on the other hand, factor in both income AND expenses to give a more complete profitability picture.The main advantage of cap rates is their ability to evaluate better and compare investment returns, risks, and value.

You want to multiply your returns and not adding one house at the time. x > + .

Using the Gross Rent Multiplier appraisal method, the property was appraised at $400,000, and I successfully sold it just below this price within a few weeks of the appraisal.

A typical Gross Rent Multiplier (GRM) in a good LA neighborhood might be 18.