Delegates pay their own way.
Which is another reason the claim that “anyone” can do it is simply not true.
We were told at our District Caucus that if you want to go to Cleveland, you have to be prepared to pay a minimum of $3,000 for all expenses (airfare, food, lodging, transportation and evening entertainment), which includes a $900 delegate fee. It was emphasized that making the effort to become a delegate should go with the idea you would pay the necessary expense. Going to the National Convention would be a lifetime experience and every dollar you spend is well worth it.