For my purposes (Turntable photogrammetry) I usually use preview quality reconstruction with sparse cloud usage set to false and preview downscale set to 2 (same as normal).
From starting a new project, importing images, aligning, reconstructing, texturing and finally exporting the model it usually takes me less than 30 minutes. But I typically use less than 300 source images to begin with.
Depending on the complexity of the object and quality of the input images the resulting mesh has anywhere from 200k to over one million tris.