This is just a personal recommendation since I use them whenever I’m in Madrid and Málaga.

Does anyone recommend knowledge sources on building a mobile home parks (websites, books, organizations, plans, etc..). 

Highly recommend @Lien Vuong she commented below and has helped a lot of our clients start of expand their investment property portfolio. 

I have my own properties throughout the area, and have worked with many contractors, PMs, lenders, insurers and attorneys that I can recommend.

Bigger Pockets is a great place to learn and connect with fellow investors.If you’re looking to invest long distance, I definitely recommend building your core-4 team.

lol"Yes, and now YOU-TOO for the low-LOW 1 time payment of just $47,000 can learn all the tips, tricks and techniques to make $1 Bazillion dollars, PER YEAR, with NO-money, NO-credit, NO-intelligence, NO-effort and in just 25 minutes per week from the comfort of your Mom's basement!" 

.- Background: Took some real estate classes before but really a lot of self learning on creative financing - Current Goal:To close my first wholesale deal within the next few months by learning from seasoned investors and applying proven strategies.I'm here to absorb as much knowledge as possible, so if you have any tips or resources, I’m all ears!

Recommendation on how to find a honest,  agent in the Cleveland,Ohio area. 

I would recommend more photos, especially of bedrooms.

If you have an older home that requires a lot of maintenance, you probably want to avoid the manager who charges a markup.I recommend shopping around occasionally to see if your PM is procuring fair pricing or just marking you up to make money without justification.As for expectations, you need to read the PM agreement and understand what is charged and why.