Compound rent + new purchase calculator.

[Calin F.]

Hi there, 

Say i have 3 properties that produce 500$ cash flow /month, 6000/year, and to buy a new property i need 24000, so 4 years of savings. After buying the property the cash flow will be 670/month, 8040/year, and to buy a new property i need 24000, so less than 4 years of savings. And so on. 

Does any of you guys have an excel spreadsheet or a calculator that could project something like that for N number of years?

Thank you.