You can of can check profitability using the F2pool site https://www.f2pool.com/miners

The problem with buying a miner is that you need to pay the entire machine cost up front along with hosting and cooling while keeping your electricity costs low enough to profit. Another option is to buy an NFT that represents a share of a mining farm like what Digimint is doing: https://bitcointalk.org/index.php?topic=5460406.new