It took about 3 hours for the base, 1 hour for the top bracket. It depends on material and settings. I printed them with 0.35mm layer height and 20% infill. The black one is ABS, red one PLA. I guess PLA will do as well for the base, as there is enough cooling inside (PLA has a lower melting point and I wanted to make sure the screws dont fall out because of some heat)
Maybe its best to install PrusaSlicer https://www.prusa3d.com/prusaslicer/ and load the STL files and play with settings. Then slice and export gcode, and Slicer will tell all about material needed and how long it will take to print.