You're asking the $1,000,000,000,000 question - there's no right answer, but there's only the right answer for *you* because its so subjective. 

We just got a deal under contract subject to the existing financing.

maybe they would do a subject to and have you take over their mortgage payments - do they have a good interest rate? 

Any advise is greatly appreciated on the subject! 

So often rentals don't have taxable income; and once they do it's still not subject to the payroll taxes paid by W2 wages or on self employed income. 

They only want to do the bare minimum to keep places occupied, collect and distribute payments, and send out their preferred repair people.

questions regarding subto.
-How are arrears handled, how do you ensure once arrears are caught up that seller doesn't walk on you. 
- Can you do subto with a lein on property. How is this done.
- When handling insu...

Your "clients" will disproportionately be elderly people who you will be taught to "help" - somehow you convincing them not to take market value by listing their home, or selling it subject-to, is "help".- In between finding these "clients" you "help solve a problem for" (in the language of the gurus), you will be angrily dismissed by hundreds or thousands of people, if you are able to get into contact with them. - In the extremely unlikely event that you get a property under contract, your assignment fee, in many locations, and probably on average, will be less than the commission a licensed broker would have received for selling the property. - You will be at risk of breaking the law, as many states are creating laws that effectively ban wholesaling, and while wholesaling gurus claim that this is not the case, they are either lying or deluded.

Without solid knowledge on this subject, you can easily end up in hot water. 

Administrators are not subject to any such scrutiny and are really just middlemen.