How can anyone build a PoS staking pool

[Little Mouse]

What are the necessary step build a PoS staking pool so that I can stake with a bigger portion of coin to get block rewards frequently. I can join with some other pool but it’s very hard decision for me to trust other  with my coin. So, how can I build one? And what's the minimum cost I need?

[FP91G]

For PoS coins, this is called a node. Each coin has its own requirements for a node. You need to have a certain number of coins (for Ethereum, this is 32 coins) and the most difficult thing is to set up a node and monitor its work.
You need to update the node yourself.
Sometimes it's easier to delegate this work to a trusted service or wait for an easier solution.

[anu1908]

i think most of the documentation are available on the project docs. you might want to checkout dPoS or lpos. they allow you to stake on a pool without sending your tokens, but not many projects support it. it's a good alternative to the usual pos where you need to send your coin to the validator address imo. cmiiw.