We normally quote % as net pre-tax - meaning, after all purchase and routine running costs have been taken into consideration (barring unexpected expenses such as vacancies or maintenance).Is this what you're all referring to here?

Some stuff I buy top notch tools - Bosch for power tools, Hitachi nailers.

A new flat roof is ~$12,000 based on recent quotes.3) Electrical - I haven't really done much with the electrcial, but could potentially increase the power to the property and update all the systems.  

For instance, I'm more accepting/lenient when it's a medical bill in collections because those type of expenses are typically unexpected and can be very overwhelming for many people.  

I've seen fake alarm systems which basically are stickers, SIGNS "(This Property is Under Video Surveillance" etc), and even flashing red lights that are battery powered-battery powered alarms - they have these at harbor freight, you can put on windows and doors- they're powered by magnets --Does anyone have recommendations for better battery powered or simple DIY alarm systems?

The outlet behind likely provided the power for the blower. 

But make sure you keep enough reserves for those unexpected expenses (they're coming I promise you... you don't know when and you don't know how much but oh boy are they coming). 

At least you didn't call it a "power team".

Just the rehab, first time around, without hard money can really ruin you with unexpected rehab costs.

If the powers that be knew what I was doing they may not like it, but the employees think nothing of it.