Recommendation for the cheapest possible MAC computer to just package game to iphone

Hello,
I’ve been working on a mobile AR game with Unreal Engine 4 (ARKit pro) on a powerful Windows PC. Now I need to package this game for iOS, but I’m quite short of money to acquire a MAC computer (They are usually too expensive). So, my idea is to have the MAC just for packaging my game and installing it in an iphone, nothing else.
Please, could you Epic guys help me with your recommendation on what MAC should I buy for this purpose?

I appreciate it.