When VisiCalc hit the scene back in the eighties (in the last century), the relatively small group of Apple II users went crazy. It was like manna from heaven for the poor accountants, scientists and engineers who were used to filling in enormous analysis sheets with a pencil. Now, they could use VisiCalc to do the same task, AND calculate the result automatically.
Serving for a multitude of purposes and being renowned for their efficiency and reliability, spreadsheet solutions have a major contribution to business management and development. Existing spreadsheet solutions are no longer limited to accountancy processes (monitoring financial data, managing budgets and facilitating a series of data manipulation processes); they can also be successfully used as means of business analysis, organization, as well as forecasting, allowing companies to gradually expand, achieve better exposure and neutralize the competition.
Once you design the type of budgeting spreadsheets you want to use, it will be easy to copy it for subsequent months or years. You can also use just one sheet and create tabs for each month.
Rather than having to go through the pain and suffering of learning a new technology and having to experience trial and error development, the best route would be to acquire the services of a consultant, who can identify your needs and create a customised solution. Obviously, the cost of such a project would depend on the size and complexity of the spreadsheet and your requirements. However, you might be surprised at how cost-effective this project would be.