You forgot some important aspects:
People will have to give you all their belongings. They will have nothing if they ever want to leave. This can be done by making them pay for the workshops, with levels each more expensive then the other, making them not wanting to give up since they are already this far in and makes them give you everything they have to reach the next level. They must do so, otherwise they won't have true devotion and they will risk punishment and have fear of being expelled. Look at Scientology, NXIVM.
They need to break ties with friends and relatives. Isolate them, so they have no one to return to if they ever want to leave. True isolation, with only you to lead them. They cannot trust anyone else, they cannot trust themselves. Only you. Again, Scientology.
Reward and punish them, but haphazardly, you don't want to be predictable. This way they will do anything to get rewarded and are super scared to be punished. Break them down mentally, then build them up again according to your strict plan. Controlling their food and sleep helps (deprive them). They will follow you blindly and give up everything. See the documentary Stolen Youth on Hulu.
What many cults do wrong, is not having a business plan. You need income, so make them work for something you can sell. See the documentary Wild Wild Country on Netflix, they did this perfectly. You have basically free labor so you can compete in many markets.
And don't forget you need good propaganda. You need new members, they need to think everything is super happy and they will learn new things about themselves (they will, after you break them first). Have a PR division, don't be scared to pay someone properly to do this. Look at NXIVM, Scientology.
There's a documentary about NXIVM called:
- The Vow
Documentaries listed above:
- Wild Wild Country
- Stolen youth (this one was heavy on me)
Other documentaries to watch:
- Love has won, the cult of mother God (this one is really fucked up)
- The way down
- Escaping utopia
- Raël
- The deep end
- Breath of fire
- The program
- Escaping twin flames
- Kumaré
- Prophet's prey
Red Bull, they are nazis and spread fake news about conspiracy theories on their own TV network in Austria. Source