How many people to invite?

We live in Ohio and our wedding is in Florida. I'm having a really hard time deciding how many people to invite because I know it's totally unfair to expect people to drive/fly to Florida and pay for a hotel. But at the same time I don't want people to feel left out for not being invited. I want a small wedding and I don't have to spend a ton other than location part. I just don't know help!