I would have provided - free
a toolkit for data mapping - I would do a data map and then leave the toolkit for use afterwards by anyone else who needed to use it
DPIAs for every area where I identified a risk and each project/campaign that was currently being undertaken and a template left for use afterwards
A data protection policy covering: the history of the organisation in question, the theory behind the GDPR, volunteer specific guidance, role of the ICO, how to handle data requests, redaction of personal information and how to do that, anonymization of personal data, data sharing, PECR and the e-privacy directive, privacy notice, data breach report form, subject access request form, change of details form, obligations as data processor under GDPR, obligations as data controller under GDPR, third party processing agreement if required and a template left if needed for future, confidentiality agreement, information security policy and best practice around use of personal devices, and a records management policy.
For free. But I know fuck all