Our data is merely 77,4 MB on disk Will the above suffice, or should we just upgrade already?

For RAM, you'd need to measure 2x to 3x your data size to be able to use Typesense comfortably. So if the actual size of your dataset sits around 77.4 MB, you're more than set with half a GB of RAM. CPU constraints on the other hand have to do with your daily traffic and that's something you need to check out as traffic gets bigger. If you're servicing thousands of searches per month, the base config of 2vCPUs with 4hr Bursts should suffice