Printing such a scaled-down plant model requests a lot on the printers' stability and we highly recommend you use industrial 3D printers, although we also need to split the whole plant into different parts. With desktop 3D printers, the pipelines are easily broken even with supporting structures.
Solution
Step 1: Check the STL files, make sure the sizes are correct and there are no missing parts.
Step 2: Add supports for the overhang structures in case they may collapse during printing.
Step 3: Split the parts and arrange the placement of all these models in Cura and process printing. SLA Generic Resin is good enough for general uses.
Step 4: Take out the prints and rinse with IPA. Polish with sandpaper and post-cure them with UV.
Step 5: Color the parts according to the blueprints and then glue them together.