The noisiest part of the machine will the spindle. If you use a trim router it can get fairly noisy. I’ve heard DC spindles are much quieter. Speed control I’ve heard helps also.
This has some setups, such as enclosed boxes, to give you some ideas:
https://community.inventables.com/t/x-carve-workspace-showcase
Regular dust collector should work fine. Search for dust shoe, or suckit on the forums.