Running immich, HA and Frigate on a RPi4 with Coral or on a HP Prodesk 700 g4 (Intel 8th gen)

Currently I've got a RPi4 without Coral, running Frigate with 2 cams, HA, Paperless, Photoview and Qbittorrent. This works well but maxes out the RPi4.
As I want to add Immich and more cams, I have to upgrade. Budget allows for either a USB Coral with the existing RPi4 or buy a secondhand HP Prodesk 600 g4 with Intel 8th gen. According to Frigate I can use Openvino for object detection. Otherwise, I could add a Coral mini pcie, with a mini pcie to pcie adapter. But that stretches the budget.
Besides frigate the HP should be able to run the rest.

Any thoughts?