Isometric tilemaps/ tileset and sprites - Is 3d model more cheaper than 2d???

Hello everyone. I’m still learning about the price for artist. So, hope someone will answer me some questions again.

1/ As every newbie, I though the price to made 2d tilemaps/tileset/Sprite is very cheap, and finally discovered that it actually every expensive.

Exp: In Beat Em Up game. With a player’s character with some standard motions ( go, jump, attack, get hit, die), the artist actually have to draw everything. And the work actually huge like this:

https://justpaste.it/img/23d562d45cb13f6daff14b0619b8175e.png

So. If we want to made a character ( object?) with too many motion, is it cheaper if we recruit the artist to made 3d model of that object, and use that 3d model creat as many 2.5d animation as we want?

https://justpaste.it/img/ff1f06e0c37273d26b82d02ed40a1c69.jpg

2/ Some strange question: How much we have to pay for the artist to make…gameplay menu. Look like this ( menu bar, text and icon. Not include Character’ avatar and Character’s cards).

https://justpaste.it/img/d8546b17cb675f5f7974a3f26bd50732.png

https://justpaste.it/img/7306f80db9a326ae3697b7b44d4ddad7.jpg

 thank you very much for the teaching. ^^'