Now that you have all of the information on the initial costs of the proposed changes and the impact of the changes on the ongoing financial position of the company, you must determine how the company is going to pay for the changes.
Depending on the magnitude of the changes and the current financial position of the company, it is possible that current profits will be enough to cover the costs.
Alternatively, it may be that the company will need to raise money in some way (e.g., loans, selling equity, etc.) to cover the costs.
Your job is to offer clear recommendations regarding how you think the company should pay for the changes and show that this is financially viable given both the current financial position of the company and your projections of the financial returns that can be expected over the next 5 years if your proposal was put into action.
Note that if you are recommending external financing (e.g., a loan), you must show the implications of this in your financial projections (e.g., interest and/or principle payments).