Reminds me of the bumper sticker "He who dies with the most toys wins" or George Carlin - The new American pass time is consumption - maxing out your credit card buying things you don't need with money you don't have.

If it is a new property use that sticker on the furnace to find out who has serviced before.

I've seen bumper stickers that say "Will the Last One Out of Detroit Please Turn Out the Lights"!

Some was.Here is an attempt to clear the record.To be in total code compliance, you must either:- Install 2 prong outlets- Install a GFCI receptacle (3 prong) marked with the sticker that comes with it "No ground present"I must confess, without doing further research on the GFIC breaker suggestion, above, I am not sure if it is code compliant or not.

A thought is to issue limited business or company car sticker and ask them to put on the windows.

You and @Paul Sian share sentiments of the sticker shock aspect of Northside it seems.  

At a sticker price of around 20k it would take me about 10 years to make the money back.... so still not worth it even for the primary res.

Or do you arrangements with tow companies allowing them to cruise through your properties and tow any car that doesn't have the right kind of sticker?  

While I'm checking up on the trailer , the onsite park Realtor asks me about listing it, notes it doesn't have stickers and educates me about retiring VIN so you can sell as real property and since mine was this or that it was retired, making me feel grateful I was good on this new VIN information.Now on the market, got me a buyer, fast cash closing and title company says the VIN wasn't retired after all, still in original owner name since 2006, and I don't freaking own the mobile home.So thought I'd share my story with you while I consider my options.  

Here in the SF Bay Area income is always skyrocketing past inflation, but you're paying for that in the sticker price of the home.