What are some of the criteria that you use to forego previous rental references as it is their son who will be renting?

Where I am, land is pretty expensive, but the lot I was referring to was literally just a fenced dirt lot. 

These amounts are reasonable but depends on what area - for example, in Philadelphia we charge 8% for full-service PM but charge 20% markup on maintenance and a full month for find a tenant - would call a reference or two before you jump in

I have reached out to Tyler, and shared that I was referred by you.

Infections and collections are just one part of the system and I need to become familiar with the process for future reference.

@Forest WuRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Best way to find a lender is from someone referring from personal experience . 

Check credit (I'd recommend at least 650 and higher), check income by getting 3 months worth of paystubs (make sure they earn at least 3 times the monthly rent), I'd also recommend calling their old landlord for a tenant reference. 

I was wondering if anyone had clear SOPs written out for the property management side of things that I may be able to reference?

Simple -- the fraudulent actions and misrepresentations you reference are against statutes and contractual terms.