NanoPC-T6 $100 board: dual 2.5G NIC + M.2 E WIFI + M.2 M STORAGE + SIM slot LTE

https://www.friendlyelec.com/index.php?route=product/product&product_id=292

This is a $100 board depending on your configuration it will add up.
Case +$20 has a power button, reset button

What would be a perfect OpenWRT router combination?

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4/8/16GB RAM
32/64/256GB eMMC
2x 2.5G Ethernet
1x M.2 PCIe 3.0 x4 (Storage)
1x M.2 PICe 2.1 x1 (WIFI / LTE)
1x microSIM slot
1x miniPCIe connector

optional: case passively cooled