making Blender Files/ Figures SLA 3D printable

I have some Blender created figures and need them ready for 3D print. They have a lot of details and therefore partly lots of different meshes which needs to be combined without loosing fine details. Or some items like in this file (not visible glasses) needs to e deleted from mesh.

SLA 3D Printer!

Attached is one example.
Budget needs to be discussed separately.
E.g. possible per figure or per 10 figures