Even my client who owns a large insurance firm titles in LLCs.  

Here is a great list of resources provided, in part, on a prior post by another bigger pockets member (John Jacobus): BooksMobile Home Park 10/20 Investment System by Dave Reynolds, Frank RolfeMobile Home Wealth Part 2: How to Become Even Wealthier investing in Mobile Home Parks by Zalman Velvet, Stuart SilverThe New Investor's Guide to Owning A Mobile Home Parkby Laura Cochran, Erin CochranPodcasts:The Mobile Home Park Investing Podcast with Kevin Bupp and Charles DeHartMobile Home Park Investors with Jefferson LillyMobile Home Park Mastery with Frank RolfeMobile Home Parks in Real Life with Ryan NarusWebsites/Blogs:Park Street Partners - http://parkstreetpartners.com - This is the investment firm run by Jefferson Lilly and Brad Johnson.

I currently have a partner in a private equity firm.

Most foreclosed homes in our area is now through a combination of bidding and mls through an auction firm with a local broker presentation.

They all have their strengths to help the landlord.Realtors:  A great place to start would be the same sites you search for PM's because a lot of PM firms also have a buy/sell service as well. 

But I wanted to get a feel also for who people may recommend (firms or individuals).

My agency contract states that:Property Investment: Associate may acquire, for personal investment or residence, property listed with Firm's office or through the MLS, provided that Firm and any other Associate's portion of the commission provided in the listing is paid at closing.

70/30 splits with 70% coming to me until Firm get's paid 17.5K at that point I'd get 100% commissions.No monthly desk fee's, technology fee's, office fee's etc. 

As such I created The Ultimate Guide to Grading Cleveland Neighborhoods so out of state investors can get a firm grasp on the Cleveland market.Knowing the pros and cons of each type of neighborhood is very important.

I recently changed Firms and in my previous role had been maxing out my 401(k) every year as is the "standard" course of action (my last company also provided a 401(k) match so this made more financial sense).