FWIW, both of mine never had clowns for at least a year.
I'm a little leery about posting something that differs from Rod's experience because he's way smarter than me.

Or at least been doing this longer than me.

But at the size of the anemone you have there, I would be a little concerned about clownfish thrashing about in there.
There could be something to what he says though. Clowns will help with localized water movement, probably help flutter away any slime, might drop small bits of food that the anemone can scavenge ... and so on.
But I've seen the way MY clowns treat their carpet, and at times they thrash about like a fish out of water. A healthy anemone can withstand this, a new anemone mmmmmmmight not.
Other than that though, it looks to be doing not too bad, all things considered.
Stay the course, hang in there.

This one has a lot of promise should it live for you.
I really feel for you. I've never been so stressed out as the times as when I've added a new anemone to my collection. I can only imagine how much sleep you're getting.
