Google My Business (GMB) and Google Data Studio (GDS) connector reporting - Advice?

\What's the best approach for reporting on multiple clients' GMB data - would love to keep the reporting in GDS if possible.

I am new to reporting on Local SEO performance and can't believe how much of a pain this is (or how costly) if I want to use a 3rd party tool.

I have a small team and I'm trying to make a scalable solution with limited revenue at the moment. I would appreciate any advice. Don't think I can afford SuperMetrics or even Jepto at the moment, we're really early stage.