How to say “Well, it's a nice idea, in theory. But, um, has anyone asked the shop owners?” in Japanese

In Japanese

まあ、理論上(りろんじょう)はいい考(かんが)えだと思(おも)います。でも、えーと、店主(てんしゅ)たちに聞(き)いた人(ひと)はいるんですか。

Mā, rironjō wa ii kangae da to omoimasu. Demo, ēto, tenshu-tachi ni kiita hito wa iru n desu ka.

Well, it's a nice idea, in theory. But, um, has anyone asked the shop owners? in other languages