Did you hear Greg Gutfeld’s suggestion? Break them into three groups of five, put each group around a table, and have them just have a conversation about issues for an hour. Three consecutive “shows”, Groups A, B, and C successively.
Another third rate solution.
How about a solution that was popular at the time of the country’s founding.
Have a list of questions that are asked of all candidates everywhere and (I know this sounds really weird to people raised today) get everyone to answer the exact same questions.