i have 2 ideas that you could try:

1. use the laptop as a second monitor instead of another computer and then just buy keyclone, you will be able to start boxing easily in about 10 minutes

2. find a way to broadcast your keyboard and mouse across your network to work with the laptop too, i personally dont know how to do this because i only have 1 computer but i thin you can use keyclone or octopus and do this