We've spent many more times than that one fish.... but that's too much. The specimen has spines that are unseathed, so he's had some man-handling. If I'm going to pay preemo prices, I want a preemo specimen.
We have our experiences shared in the lionfish guide if you care to read that.
The temp will need to be in the 60s for the long-term. You're not going to get away with 70s for long.