My neighbours got a pair of meerkats as pets. How can I help to care for them?

Morals aside, the neighbors from in-laws now have meerkats and I want to make sure they have their best lives, because we share the front garden and entrance to the houses.

Anyone experienced can advise what to provide for them, plz?

I already know it's time to bring a bunch of soil for them to dig and some high points so they can get a good view on the world. (:

Note:

I am aware they don't make the best pets but that's not for me to judge. The neighbors won't give two shits, but I can at least help the animals to have a better life.