I am using a pc with an intel I7 and 64 gb of ram. SSD hardrives and it is optimized for recording and mixing.
But I am sure that Niki is right. Start with a smaller system that can be upgraded. Freezing is the way to stay with a smaller system while getting all the benefits of your DAW. I recommend a PC with an I7 and 16gb ram too. It should have a thunderbolt 3 port and usb 3 so that all interfaces are connectable in the future.