As a business, you want your resources to be maximized to the Glory of the Lord. The decision of which local ministiries to support have to be carefully and prayerfully considered.
As a business owner, you also need to see the results of your investment to verify that you have made a sound decision.
Your ROI from your investment in the TPC can be seen in the lives changed. The lives of your customers, which in turn helps you too.
Where else can you actually visit your ROI? You can visit the TPC.
Talk to the clients. Talk to the staff. Hear their testimonies
Hearing their testimonies and seeing the changed lives is the best ROI there is.