I am looking to start out with SFR or small Multi family investing (possibly Turn-keys). 

I'm picking up the keys Monday or Tuesday 7/16 or 17/2018.

So where to find, how to get, what sources to use?

Neighborhood is key. 

Your decision of where and how to store the coins can be key in terms of your IRA's compliance and therefore risk. 

But if you do then it's absolutely acceptable for you to access cash from any other source. 

@Anthony HowellTwo things come to mind:1) Calculate the cost of borrowing from the 401k versus other sources of capital to see what is cheaper.2) Research into the terms of payback.

@Darin Young as others have said networking is key.

Most builders have their pet agent who is constantly sourcing and here is how it goes.the agent will find the dirt charge NO fee to the seller thereby getting seller top dollar compared to some wholesaler low balling them.. and then the agent gets the list back on a brand new home.. 

All income must be from a verifiable source.