Essential minimum?

A phone (preferably GrapheneOS)

Raspi4 full node

Essential Preferred?

3- miniPCs (1 full node, 1 lightning node, 1 QubesOs wallet, password manager)

1- GrapheneOS phone

1- Innocuous NFC object

1 to 3- HWW of different manufacturers

1- Portable mini thermal printer

2- [secret projects I am working on]

And as many bitaxes as comfortable.