This is a swag since I don't have any idea what your facilities are like, #of staff, inside/outside, etc. So, here it is my friend. Just keep the IT in check!
1. Make the cheese sauce/hot hold it in a soup kettle, preboil the noodle to al denta and hold as well in a soup kettle or covered/heated steam pan. To Serve:, scoop the pasta , add a little olive oil, add a scoop of cheese sauce, mix, plate (bowl), in broiler/microwave ~30-45 seconds to bring to temp, serve.
2. Prepare serving bowls, cover, and place in an insulated carrier/warmer. Reheat in a microwave for ~30 seconds to bring to temp.
3. Pre-cook batch containers of the M&C, in a covered steamer, transport in an insulated carrier, reheat in a convection oven or use one of the above methods prior to serving. (current procedure I use)
John