Track your income and expenses in report form and review them regularly with people you trust and understand know your goals.  

I have no doubt tenants will do this on a regular basis and that there will be regular issues with the laundry units.

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Regular loan originators, investment specialists, portfolio lenders, fix and flip guys?

Make sure to view the Bigger Pockets book store: https://www.biggerpockets.com/store

Check local pawn stores and CL for the tools. 

Instead, it's the Smoke Detector Act, which is a state statute (That's regularly ignored outside of Chicago),  specifically 425 ILCS 60/3.  

For regular income- like from wholesaling.

For those of you who flips or do a rental turnover that the renovation may last a while - let's say longer then 3 months - during such time the property will be vacant and you may have expensive tools laying around, as well as materials and appliances being stored at various stages of the process, what do you do to secure and keep an eye on the property during that time?

Also want to make sure to keep all food items stored so they don't have incentive to go up there in the first place.