they sell x86 laptops with a fair amount of repairability, and sell mainboard replacement upgrades… they even have a case so your outgoing mainboard can be used as a sbc.
Discussion
BTW, there is some risk on running mac in VM looks like and signing into apple services...
https://docs.bluebubbles.app/server/advanced/macos-virtualization/running-a-macos-vm
And bluebubbles requires firebase. OK, best option is to NUKE imessage usage. This is too complicated setup and totally will fail whenever Apple adjusts small details.
Frame Work looks cool! But, easiest and least expensive is picking up used x86 preferably from university auctions :)