my two clowns for over a year now haven't hosted anything. finally they started to host my torch coral - thinking i could outwit them, swapped places with the torch and anemone. Went back to hosting nothing
it kinda seems like clown fish will ALWAYS do the opposite of what u want them to do. especially when they look like grumpy old men kinda how mine do. they love being defiant.
lots of LFS have clowns hosting anemone already, they might charge a lil more, or you can put a bunch of corals that'll sting, eventually they'll go in one of them, stay away from condy.(haitian) anemone, never seen a clown host that specie.