Also an irrelevant question I was looking for good synonyms of the word spacious and I found the word cavernous.
Is it correct to use it?
Cavernous is used to describe something that looks or feels or has the attributes of a cavern. I think it would sound weird here. You could say "roomy" as well, but that's more colloquial. If you're going for a professional tone, "spacious" works best.