Yes, I have thought about it. Because with my last move, I had my washing machine (Miele) and dining table (solid wood, extendable to 2.9m) transported for a small fee. So carrying down, transporting, and carrying up.
I will do that then. Or possibly I will call a structural engineer and talk to one. Only you usually don’t know in advance whether they know what they’re doing and secondly whether they charge "normal" prices or rip you off.
Michael