You may be interested or even tempted by the progress made in recent years with voice synthesis or artificial intelligence.
Indeed, one can question the potential gains in terms of cost or speed. However, be aware that synthetic voice offerings are paid: monthly, yearly, or sometimes per word. On the other hand, consider the limitations: once the result is obtained, you don't really have a choice to modify something that doesn't work. For example, the pauses between words, the emphasis on certain passages, bringing the text to life.
As for speed, let's be frank: do you sincerely need a recording in 5 minutes flat? Know that I deliver most of my recordings the same day I receive the order. And of course, I can make modifications right away, just let me know!