I don't want to invite anybody for my wedding. Is this a nonsense idea?

I plan on getting married in the future. However, I'm not planning on having a wedding ceremony nor a very expensive wedding dress. The main reason is because I want this day to be all about me and my husband and that's it. No guests, no strangers, just us two. I'm planning to announce my engagement but I'm not planning to announce when I'm getting married or invite anyone to my wedding and this includes not telling family that I'm getting married until we're officially husband and wife. Is this a non sense idea?
I don't want to invite anybody for my wedding. Is this a nonsense idea?
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