Always make a budget, it is best to start with the budget officer of the project department of the construction unit. You can familiarize yourself with the actual construction process first, which will help you make a budget in the future. Can do 1-2 years, and the main study in the construction unit is the construction site.
Then you can jump ship to the cost consulting company. One advantage here is that there are many projects. You can do many projects a year, much more than you do in the construction unit. It is also a kind of exercise. Of course, salary is related to business volume, and commission is also possible.