It would be fine, Sheila. A 3 layer cake doesn't taste any better....just looks "fancier"
In fact, that's how I'd do it as I don't own 3 cake pans and don't wish to.
Reminds me--- my Aunt Dood once said she didn't know how to do that...and she didn't wish to learn......so DH and I began to say "we didn't know how ---and Aunt Dood!"...
Know I told y'all that story before..