I'm looking outsource our maintenance tickets to a third party that will handle them in a timely and professional manner. 

Got me a website.

Glenn Mueller, Ph.D. has this on his website, which is http://blackcreekgroup.com .

@Joe Fairless , Michael Blank, Rod Khlief, and Kevin Bupp (please excuse any misspellings) all provide opportunities on their individual websites to submit offers for review.

They sent notices to the property even though it clearly states on tax county website my actual mailing address. 

The tenant pays the fee right on the website, I get the info, and then send a message of approve or deny right through the SmartMove website. 

Ive been meaning to do a blog post on that, or throw the info on my website, but I havnt had time to get to doing it.In DC the regulations are basically the basement unit needs a seperate electric meter, 7 foot ceiling height on 70% of the basement, an egress window, and front and rear doors, only available to owner occupants. 

If you don't have the knowledge or experience to invest in real estate directly then research this website (also check out joefairless.com) and listen to all the many podcast (like Old Dawg's REI Network or Best Ever RE Advice) on RE investing and read the recommended books (like Rich Dad Poor Dad or REI for Dummies). 

I am super glad on got on this website to learn from successful people. 

But there's also Direct Mail, Websites (SEO/SEM), Social Media, Wholesalers and dozens of other methods.