Best way to use whonix with 2 hosts ? (Physical Isolation)

Hi all,
as i have a very old computer, i’m tired to launch 2 VMs in order to use Whonix, i think i’m about to proceed on a Physical Isolation without any virtualization, to gain some RAM and comfort. It is to say : 2 hosts.
If i understand well, the better way to do that is to install Whonix-Gateway on HOST 1 and then any Whonix-Workstation on HOST 2.
All is explained here : https://www.whonix.org/w/index.php?title=Dev/Build_Documentation/Physical_Isolation/9&redirect=no

I have some questions about Hardware.
1st HOST
I suppose an old laptop would do the job. I used to launch Whonix-Gateway with 128 MB RAM (command line).
What about a Raspberry Pi ? Powerfull enough ? I wasn’t able to find any review. (Whonix download | SourceForge.net)
If i understand well, in the case of a clean laptop with a wifi dongle.
Steps are :

  1. Get Debian => OK
  2. Install Debian => OK
  3. Network Configuration => step where i must download/install my wifi dongle drivers ?
  4. Logon & Update/Upgrade Debian => OK
  5. Preparation => Ok
  6. Get Whonix => OK

2nd HOST (In a case of a Windows XP)
i only need to connect “HOST 1” to “HOST 2” with ethernet cable and the job is done ?
I mean, in the windows network manager, if i only use “whonix gateway network ethernet connexion” to navigate on a browser, my IP address will be the one from the gateway ?

Regards,

No new info on Raspberry Pi.

step where i must download/install my wifi dongle drivers ?
This applies: https://www.whonix.org/wiki/About#Based_on_Debian
2nd HOST (In a case of a Windows XP) i only need to connect "HOST 1" to "HOST 2" with ethernet cable and the job is done ? I mean, in the windows network manager, if i only use "whonix gateway network ethernet connexion" to navigate on a browser, my IP address will be the one from the gateway ?
Then network settings you can find on https://www.whonix.org/wiki/Other_Operating_Systems applies.

(Needless to say, a lot speaks against Windows, XP.)

I wouldn’t use old hardware especially devices with core2duo CPUs as Intel has stopped support for spectra meltdown

https://www.reddit.com/r/thinkpad/comments/b9hkrq/is_the_core_2_duo_in_older_thinkpads_safe_from/

Clean hardware is a big challenge in my opinion.

I remember in past when my BTC was stolen using win7 and blockchain on such old laptops . Never again