It all comes down to:

• are the offers fair?
• how much can you get after tax? try finding a way to reduce the tax on capital gains
• what is your utility of this money? It’s not the same if you are already a millionaire or if you are broke, if you want to make a family soon and chill or if you want to keep working, if you can find a job paying 400k per year, etc.
• how risky is the business? you feel like it has good odds of failing to scale up so if you have no other asset, it feels better to sell
• can you find a middle ground (e.g. keep some ownership and control, to reduce your exposure, maximize your utility and your future profits)?

I don’t think you need the debt part.

Contract Bridge

Every book pale in comparison