If I were you, I would set up an Iranian exchange. That would be much profitable I guess?
You are not reading the content of his post, he has a piece of land that can be used for the mining farm, and he doesn't have the technical knowledge to set up one, he wants a mining farm because he already has a certification, now why urge him to set up an exchange when he has no technical knowledge and his interest on mining farm because of the land he has, and besides you needs big money and a coding skill to set up an exchange.
That guy is a shitposter. Don't mind him.
Honestly, I also have a hard time believing anything that the OP says as well. No way someone has so much land, they could build a castle or whatever. Build small domiciles and rent it out.
Before we deviate from topic, here's what OP should really do.
Take out some loan to build a huge ass solar farm. Earn from the electricity, pay off debt and then slowly build up the mining farm. This would be a game for the long haul. I am not sure how much time OP has in their hand and if they are indeed interested in doing so.