Like someone else said, a good air compressor is a worthwhile investment. Every homeowner should have one anyway for their vehicles, great for general cleaning up around the garage, and tools like nail guns.
I use my compressor regularly for cleaning up the pc and components. Several models are available and small enough for apartments as well.
If moisture is a concern, there's an attachment to your compressor's hose that catches any outgoing moisture.
Where I live, you have to either cover your car, or wash it 3x a day just to keep it nice. Even with filters on the intakes, it still gets in there.
Unless MSI's system is really quiet, you won't be impressing anyone when you start up your pc. You might scare them instead hehehe