Just note that with Bambu printers about past data collection practices and their in general mid to atrocious after-sales support. If this doesn't deter you, then go ahead and get one.

I do a lot of my functional parts in ABS, ASA though printing such material may be difficult on an open-air machine. The two obvious choices will generally be PLA or PETG. PLA is one of the most common printed materials, and is fairly balanced in material strength. PETG parts are more likely to permanently deform heavily before fully snapping, as well as they have a but more temperature resistance than PLA. Additionally most PETG plastics hold up decently well to UV, often making them more suitable for parts that need to be outdoors.

PLA takes not much consideration on surface to print, as most printers come with a smooth PEI build sheet by default. It will however need more cooling than printing with PETG at equivalent speeds. If you use a PEI sheet for PETG, make sure it is textured. You will destroy a smooth sheet if it doesn't have some kind of release coating to lower its adhesive properties to PETG.

There is no guarantee for spools of filament to actually arrive dry, so a filament dryer isn't a bad idea. I don't have any particular recommendations for a good filament dryer. I have a Filadryer S2 from Sunlu, but am not impressed by it.