Hey,

I'm doing research atm to set up a farm with a similar budget:

a) Low or almost no duty & taxes on import of miners.

Import duties depend on 4 factors:
(1) country of origin,
(2) country of destination,
(3) nature of goods (generally defined by the HS code)
(4) value of the goods.

You may want to look at a way to avoid import duties, VAT and other taxes, not from the point of view of where you are importing the goods to, but from where are you importing them from. For instance, shipping the goods to a third country before importing them to their final destination can help save you a lot of cash.

This is one example, there are other ways to optimize freight costs, import duties and other taxes.

b) Economical electricity cost.
c) preferably cold weather
d) of if hot weather country, i don't mind if electricity fees are cheap enough to cool down miners or collocate in a data center.

For all these, Andorra is a good and very safe place with a VAT of 4.5%, cold weather and affordable electricity. We can exchange information by pm if you wish, I'm currently looking into this and other possibilities within Europe.

Cheers