Of course it could work, this is what a pump and dump group is. Given that crypto is unregulated this is allowed (It's not allowed in more traditional markets) but you need to know that the people you're doing it with have deep enough pockets and are trustworthy. Someone can easily cash out before your target and then you're all left holding falling coins.
There are many groups of traders mostly in telegram they are just sharing what coin you should buy and when they are planning to sell their holdings. If you join in this pump and dump group you must be active and updated so that you don't be late when the time for selling comes.
If you are late, then your coins will stay no profit until your coin is useless and lose. So if you are planning to build a group or join in pump and dump group you must be updated.
Exactly, that's why if you were able to do it as an individual it would be much better but that's a lot of funds that are required to manipulate a market like that. Most P+D groups the founders will buy before they announce the target coin and will sell before it reach the target price.