I am foreseeing a bit of a push back or even turned-off potentially decent tenants by the $50/pp screening fee, mostly for a family of 4 ($200 out of pocket).I was wondering if offering a credit of either 50% or the full 100% of the screening costs from the first or second month's rent is a good idea.Thought?

This is a touchy subject.If you observed specific concerning behaviors during interactions, such as rudeness, aggression, or disrespect for property, these could potentially be valid reasons for rejection if documented properly.You should add one very important things to do on your checklist, past landlord references and it must be legit and find out why they aren't there any longer.

Clearing potential building sites.  

Next, arrange a site walkthrough to pinpoint any additional needs or potential challenges.

My focus is on uncovering properties priced under $800K with the potential to gross six figures annually.

It has so much potential.

Your credit at risk and might affect your ability to buy a home in the future. 

Does anyone have a template or method that they use in order to screen tenants effectively in order to reduce the risk of non payment and damage to the property? 

Since you’re committed to staying close to family, I’d suggest focusing on properties that might need a little work but have potential for appreciation in your market.

In our case, avoiding a buyer's commission seems to be potentially helpful with negotiations, especially since we are purchasing below what we can afford, and can pay up front for RE attorney, buyer RE fees, etc.