You can see the list of POS coins, their current price, how many nodes there are, how many coins you need to run a node, and volume of these coins. Its just a site that I use, but there are many similar ones. All in all you need a lot of money to run a node for some coins, but when its about staking and receiving some amount I would recommend some new coin, cause you can start with some smaller amount of money. Just for example for dash you need a lot of money, but for veil you don't need so much.
You are absolutely right, MasterNodes is the best place to find pos coins easily, therefore MasterNodes.pro is very informative than any other websites related to POS. I always use their service whenever I need new pos coins update. Therefore postlists is another great tool to find and analyze the POS coins, and for research purpose OP you should follow this source too, https://cryptorival.com/algorithms/pos/