You need:
Investment budgets
(cheap) Electricity available. Most mining power distribution setups require 400V 3P+N. If your site has high voltage available, you will need to step down that power to 400V using a transformer
Space to build your mining farm (close to your electricity source if possible to avoid high cabling costs). Ideally, your site has a good climate for mining (moderate temperatures and humidity) and good security to protect your assets.
If climate conditions are sub-optimal, you should contact a mining infrastructure expert to discuss cooling or heat recirculation options.
A building or Mining Container to host your miners. The quality of the build will prevent down time and protect your investment
Safe and good quality power distribution inside your building or container, using DBs (Distribution Boards) and PDUs (Power Distribution Units);
A rack-system for easy access and storage of you miners in combination with your PDU’s. Also take cable management into consideration.
Asic Miners and/or GPU cards in Rigs of your choice