@Andy Kaye used the "magic number" of a 5' by 5' space.  

I'd been researching on and off for a solid 18 months before getting my first property, and I still had it in the back of mind that you just invested a bunch of money, and checks start magically appearing in your mail box.

There is no magic number to charge for the wholesale deal. 

No website magically will get you leads, But you will have a much better chance if the website is fast, is mobile friendly, and has the foundations of what Google appreciate in the infrastructure.

(these units each have a garage and backyard) Obviously this doesn't make magic happen on the calculator, but while I'm looking at this property, it balances between a property that fits my personal needs for living, gives an opportunity to manage my own property, gain experience as a home-owner, and potentially serve as a buy & hold after I move out. 

You will have the magic of  capital gains in 2 places that you will have lived in for 2 out of the past 5 years, making it possible to do a hopscotch move via 1031 exchanges.   

You will never magically know what a house is worth. 

Try working the numbers backwards to see if a property is worth  chasing;Take FMR * 12mo * GRM to find max FMV that a unit could still provide a positive NOI.Frm (fair market rents) isn't too hard to find, but GRM(gross rent multiplier) is intuitive magic number 10 or less. 

I should also mention that their listing said the magical words "motivated sellers". 

Also the magic number you need to hit where you issue 1099s is $600 and you should have them fill out an IRS form w9 when they start so you have their full name address and social security number and can easily issue the 1099 in January.