The only problem is that you need to raise them up to get them to the size you need. Chances are that you are going to have to spend at least 12 weeks pumping food into them to get them up to Large size.

This means that you have one litter on day one.
The second litter comes on day 28.
The third litter comes on day 56.
The fourth litter comes on day 84.

So you will have four litters cooking/growing at one time before you can put the first one in the freezer.