Full/Half Day tour from cruise ship

We want to do a small tour - for example Balata gardens, one distillery(maybe Habitation Clement) and Banana museum or something like this. We are 2 adult and 2 children.

Any idea which one would be cheaper - to rent a taxi per hour, to take different taxis from point to point or to book a private tour?

Taxis are 30-60euro per hour (but which one is the correct one- 30 or 60, big difference)

No idea how much would be on metered taxis.

Private tours are hard to find online, only 2-3 companies and i cannot see any prices.