To confirm, the 4K Genie Mini is going to the second floor?
Is this C61K something new to you?
That depends on whether or not the HR54 is powering your antenna. If there's something that looks like this on the second floor (or perhaps elsewhere), you're good to go:
View attachment 162652
If you don't understand how it all works, having it installed professionally absolves you of responsibility if something goes wrong.
If you're upgrading through DIRECTV to get the C61K, I'm a bit surprised that they wouldn't install it for free.