(xpost-hwp) The Lenovo M720q Tiny

The Lenovo M720q has dimensions, performance, and capabilities almost exactly the same as the mac mini at a more affordable price. You do lose Thunderbolt 3 connectivity as well as having to use an external power supply, but the flexibility the unit gives outweighs these compromises.

https://www.hackworkplay.com/2018/12/02/the-lenovo-m720q-tiny-possibly-the-best-mac-mini-alternative/