There has been some misunderstanding in Myanmar and among Myanmar communities in the USA and other countries about the Weizzar Lan or Weizzar Path.
At the outset, let me make it clear that the Weizzar Lan is not a path that is intended to send you straight to Nivarna. If that is your goal, it is better for you to do vipassana and listen to what many Burmese learned Sayadaws are teaching.
How long will it take for a person to get to Nivarna, that is a good question. No one can give you a definite answer. It depends on whether you have a good Insight Meditation teacher and your enthusiam and diligence in following the Noble Eightfold path.
Having said this, let me talk more about the Weizzar Path.
This path is for people who wish to get to Nivarna, eventually but who wish to accumulate more knowledge and wisdom along the way so that they could help other beings.
The Weizzar Lan that I follow bow down to the Tri Ratna - the Buddha, the Dhamma and the Sangha. We do not preach anything against the teachings of the Buddha.
However, we believe that there are many secret teachings left by the holy weizzars of the past such as Bo Bo Aung and Bo Min Gaung. These teachings in the field of "sacred writings" or "Inns" and in the field of "alchemy" or "Aggiya Pyinnya" are not for those who are following the Lawkauttara path - this is the path the leads to Nivarna in the shortest possible time.
Let me be clear about this point. Those who are on the Weizzar Path practice both Samahta or "Concentration meditation" as well as Vipassana or "Insight Meditation".
They work within close knit groups called "gaings" because they do not wish to teach what they know to those who have not been initiated on the Weizzar Path. They do not wish others to misuse their knowledge.
There are many secret teachings within the domain of "Lawki Pyinnya" which are not known by ordinary people who are too busy with their own lives.
Weizzar paths such as alchemy, sacred writings, healing using herbs and minerals (called Sei Pyinnya) still exist in Myanmar and other countries like Tibet and Thailand.
The ultimate goal of the weizzars and other people who follow the vipassana path is the same: Nivarna. Only the path is different, one is the short path and the other is the long path.
The Weizzars are people who have chosen the long path because they wish to help humanity and other beings along the way, by doing acts of merit and helping those people who are in need of help.
A word of warning though. You need to be careful of fake people who might try to trick you. As in everthing else in this world, we all have to be careful and seek the true teachers.