Which motherboard with built-in processor should I choose?

Question

Iron

there is such an option:
ASRock J4105B-ITX
https://www.dns-shop.ru/product/b3e2ed6a5a653330/m...

it costs 6 thousand

performance of such a processor, I have enough

here is a comparison with the poppy mini 4014 processor -
https://www.chaynikam .info/cpu_comparison.html?Cor...

I need to assemble an extremely cheap computer

. Are there boards with similar performance even cheaper?

you also need to think about RAM and SSD -
so that there is good performance but the minimum price

for how much can you buy RAM and SSB 4GB and 128GB?

poppy mini 2014 costs 25 thousand,
I would like to assemble a machine two times cheaper