Hey,
So a question I'd ask is :
What do you wish to track through the pixel? Generally everyone opts to track the total no. of sales and the total amount earned from sales. There are other options as well that Facebook provides though. Although adding too many pixels to the same page can cause it to load slower, and hence the actual conversion you need to track(eg: AddToCart), might occur before the tracking pixel even loads!
If you like we can talk this out first, I suggest starting with just the one Facebook pixel to track the above mentioned values(anyway you would be having a Google Analytics Pixel as well I'm guessing).
The 2 days for the project is to allow for better/unrushed communication and to allow for some real time tests.
Let me know