If I were to purchase the P1S, what other things would I want to add to the order?

Hello all,

I'm seriously thinking about getting the P1S Combo (with the AMS), and to save on shipping, time, etc. I'm wondering what other things would you suggest I add to the cart?

Anything I need in the event that something breaks or needs to be replaced?

And on that note, is there any brand I can get on Amazon for parts to save on money? For example, do I need a BambuLab bed, or are there other beds that aren't name-brand that I could possibly use?

Same thing with filament - any recommendations for filament? Or is BambuLab the best filament to get?

Thanks for any help! :)