for example I’d need to make 18 at work to equal 9k rental income.So I calculated that with real estate I’m saving 35% fed 7.75% IL tax 7.25 Social security tax and 0.9% niit tax.50.6% savings ?

That is the cost of doing business and the risk you have to calculate. 

Here's a bit more in detail about how rates are calculated for DSCR loans:1.

BiggerPockets also has a calculator you can use to analyze deals and I highly recommend you start this as soon as possible, even if you are not ready to buy.

I want to know what cash on cash return means, and all that other jargon I hear tossed about.I guess I will have to learn how to use the calculators!

I am looking at my first rental property investment, with the current rates and San Diego pricing cashflow is very hard, so I wonder if I should remove tax property and insurance from my cashflow calculations as they are 100% deductible at some point.

How would they calculate DSCR?

Real estate continues to be high where I am located and when I calculate the mortgage payment with 20% - 25% down, it only breaks even with the rent I could collect. 

Here's a bit more in detail about how rates are calculated for DSCR loans:1.

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.