That is a good deal, the 3070 alone is worth like $1200
Exactly. So you can pull out the card if the build isn't enough for you, throw in your old card perhaps, sell the rig for something and go on your merry way with your own build. I don't know though, this build looks pretty solid on its own. If anything, you can probably tweak things here and there as Ian said, if it doesn't quite do it for you. There is an option to upgrade to Liquid cooling but you can probably do that on your own.