Thoughts on Valuing a Fast-Growing Business and Structuring an Offer?

I’m about to submit an IOI on a fast-growing service-based business. The business is only a few years old but has grown rapidly. Their EBITDA quadrupled from 2022 to 2023 and they are forecasting it will basically double every 2 years for the foreseeable future. I’m currently in a related industry and agree that, with the right execution, the business could grow very quickly.
Assuming their forecasts are somewhat realistic, any thoughts on valuing a rapidly growing company like this? Regarding the multiple applied, the biggest issue I see is they do not have a solid management structure in place. Any thoughts on how to arrive at a value if you are forecasting rapid growth like this? The owner is seeking a 10-ish multiple…which I think is too high based on how new the company is and the lack of management.
Also, any thoughts on how a lender would view a new business that is growing this rapidly? I’m not sure how financeable this is.

Any thoughts or feedback would be much appreciated!