What's the equation I use to figure out my Max Out Of Pocket I can give them and monthly payment?

Even if you got a good deal on the car, most likely the bank is going to use your recent purchase price as the new value, and charge a pretty high interest rate.As Timothy mentioned above, you should see if there's any flexibility to use some owner financing in the deal and just put your $45k directly into the real estate deal, instead of adding a car into the equation. 

You can read how I quit my CPA gig to buy large apartment buildings by clicking here: I quit my CPA Job to buy Large Apartment BuildingsI equate large apartment buying to a VERY intense roller coaster ride.Not the "kiddie" ride.Not the ride that just goes up and down.Not the ride that does a loop and done.The type of ride I am speaking of is very fast paced, can be thrilling, many moving parts, has ups, downs, turns, can be gut wrenching, sometimes the ride goes backwards, sometimes the track ahead falls apart and you need to take or make a detour.Sometimes the ride comes to an abrupt end and you feel empty inside with a thought of "that's it - this ride sucked and the seller info was crap what was I thinking”.Or sometimes the last ride was a total buzz kill and you have thoughts of never wanting to do the ride again.Trust me – I have had all of these emotional triggers and I am sure as my real estate investing career continues the ride will always have twists and turns.As a CPA I really get into the numbers and ask lots of questions.

I know people usually equate a Private investor with inexpensive capital. 

That goal was to grow the company from 16% to 18% profit, actually hitting 19% which equated $750k to the owner.  

Cash Reserves is part of the equation, but you also need adequate Insurance and good Credit access.

And that leaves you $-122/month.As you figure out the real numbers, you can plug them in to the equation above to come up with a better estimate.The 50% I used to estimate expenses is what is known as "the 50% rule." 

(5%*100,000/12)*12 = 5%*100,000That's the equation. 

That would equate to 20% APR which is usurious.

No PM is going to check with you for every small routine repair, but usually there will be a $500 or $1000 max SINGLE repair cost without owner approval except in emergency (such as blown water heater or furnace).As to your comments about ads, "replies" do not equate to "qualified tenants".