I use a macbook for most of my design. The key to fusion 360 is turn off show profile while editing a sketch. Only turn it on when you are ready to check your work or just prior to extrude. My garage computer is a $260 Lenovo and it runs fusion just fine… As long as that show profile is turned off. If you try to edit a sketch with the profile turned on you’ll want to smash your computer. Hell even the MacBook pro has issues occasionally with big drawings with the profile on. To answer your question, get what you can afford and keep that profile off until your ready. Make some adjustments and toggle it on and off. It’ll run smooth as butter.
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