I have a couple paintings and sketched I intent to mint as NFT but I haven't.
I have created and account on opensea but thier gass fee just made me halt the process. Like you said, it is very expensive.
Well, my advice is to look for another alternative if that amount is not worth it for him. But I think they have more buyers there even though people are beginning to move to another competitor.
Where is everyone moving ?
Blur.io
But I haven't look into it deeply.