That's a great question I unfortunately I don't have a great answer for.
The majority of the time was spent in those first few days were I built the initial product. Tweet Photo is technically quite a simple product, especially if you're familiar with the relevant open source libraries and APIs which I was anyway.
But for me the main "cost" was knowing the APIs could change and I'd need to be ready to make the necessary changes.
Oh, that's cool. So a few days of actual labour, then just a certain amount of mindspace over however many months/years. $10-30k seems a good return on that.
The majority of the time was spent in those first few days were I built the initial product. Tweet Photo is technically quite a simple product, especially if you're familiar with the relevant open source libraries and APIs which I was anyway.
But for me the main "cost" was knowing the APIs could change and I'd need to be ready to make the necessary changes.