At the closing table I received the rest of December’s rent from the previous owner.

I am new to the game and using the FHA loan has just seemed to be the most common way to house hack (at least in terms of what the resources I have read have said). 

If you don't/won't have WiFi then you should either consider a SimpliSafe system that you can move around from house to house, or some type of Trail cameras like hunters use for identifying game areas.

Communicate expectations upfront—because once they start double-parking or treating the place like a frat house, it’s game over.Cameras, Cameras EverywhereYou’d think adults wouldn’t steal each other’s food, right?

Often times investors will plan seller financing strategies before asking the owner if its even on the table. 

He would need to find a place to live,which would take money off the table for collateral in his next deal.

Have flexible repayment terms been a game changer for your deals, and if so, how have you leveraged that flexibility to scale your investments?

Since most people who are not actively seeking a sale are not motivated to sell at anything other than a top of the line price, this is going to be a numbers game of x thousands of contacts for every potentially doable deal.  

GP's typically have to put skin on the game.

Name of the game for me is speed to move the contract.Currently I have a mass email marketing platform that works well but no one checks their email as much as their texts.