If this is someone who has their own business and you only use them once and you get a reciept from them then a 1099 is not really needed.
He still has to report all his income even if he doesn't get a 1099NEC from anyone. It would be self employment income to him and fill out schedule C for it. He will pay self employment tax on a profit of $400 or more.
He is not employed, so can I pay him $400 without him having to report it and allow me to report it as an expense