I prefer a seven-button mouse.
Arrow keys are mapped to the extra buttons for instant Inference Locking.
Currently $18 USD at BestBuy
The basic SpaceNavigator® 3D mouse is best suited for presentations, not for modeling.
• A keyboard shortcut is faster than fishing for tools with the mouse.
• A programmable mouse button is faster than reaching for keys.
Fast Navigation Commands
• Standard Views (7 views)
• Zoom Extents
• Zoom Window
• Zoom Selection
• Previous (6 views)
• Orbit Tool > Double-click (Moves the center of view to the cursor location)
• Face Context Menu > Align View
• Axes Context Menu > Align View
One of the GEFORCE® GTX 10 SERIES with 6GB memory is a good choice.
SketchUp Hardware and Software Requirements — SketchUp Help
https://help.sketchup.com/en/sketchup/sketchup-hardware-and-software-requirements