Let's assume you decided to consider the CGNAT solution. The first thing you need is to calculate the economic feasibility of CGNAT for your company.
When you buy CGNAT the cost of one IP address for your one subscriber decreases by 20 times. Therefore, It will cost from $0.50 to $1 dollar per IP address. For example, an operator wants to add an additional 1024 subscribers to his network. It will cost up to $5000 and not $25 000 as it was before.
It is also important to take into account that in some cases you have to carry out the required investments in hardware and infrastructure that start from $2 000. The good news is that they are made only once.