The first thing to consider is the amount that an ASIC miner will cost you. The machines are available in a variety of price, and a greater price doesn't always translate to an investment that will yield more. If you're purchasing the ASIC miner, you have to consider:

• Hash Rate (how quick the miner is able to find the solution)
• Its power usage (how much electricity is used)
• The brand's reputation is a big factor in the success of the company.
• Options for support and warranty

Even if a machine is costly, it may not be the right option if it requires excessive power or doesn't have the highest hash rate. However the machine that is less expensive may have a shorter lifespan, or may not be as efficient. Therefore, it's essential to research and read reviews and other benchmarks prior to purchasing one.