We have way too much insurance because it's a thing for DH, and since it's not too expensive, I humor him.
Final expenses can be really cheap, if you want them to be. A few thousand, maybe less. If you want a silk-lined mahogany casket and a big production funeral, it can be much more, but it really doesn't have to be expensive.
The big things to consider would be replacing his income, and perhaps covering some time away from your practice if you aren't up to returning to work right away. Honestly, $50k is probably enough. That pays for a modest funeral, gives you some time off work, and buys you some time to adjust to your new, slightly decreased income. If you feel like you need more, and extra $50k wouldn't be too expensive if it gives you some peace of mind, but any more than that seems really unnecessary. $250k seems like way more than you need. Yes, it's cheap. But can you get half that coverage for a third the premium?