You're aware that you have a lot of things to consider, right?
Including:
They (as recommended not by myself, but by Dr. Roy Caldwell - if you've been researching Lysiosquillina care on the internet you'd have heard of him) should have either a 100 gallon tank or a total of around 100 gallons of water in their system, be it sharing water with a large tank, a refugium or some other sort of denitrification system.
They need 13 inches of sand as a bare minimum, more to be on the safe side. They also can't dig a burrow that deep that will hold together with just aragonite. I have heard (not personal experience in this matter) they need some special mud mix to contruct a healthy burrow.
Be prepared for a mantis that refuses to take dead food like silversides.
The weight or 12 inches of sand is enough to break glass. So you'll need a special design to keep 12 inches of sand intact while being able to see the mantis shrimp.