As a rough guide, you might factor in another 8-10 hours, because, according to Fred Brooks, a proper programming "product" takes about x3 as long as a "program".
Taking a wider view, there's an appeal to "cloud components", where all components are rented - including ones as simple/trivial as this. For this to work, it has to be cheap enough to be a no-brainer (esp for projects made of such components). Say, 1/100 - pennies - e.g. 9 cents /m/e. In the long-term, you'll see free open source alternatives, and maybe even free hosting (cloud providers supply it free, to support their hosting of your actual app)... and maintained.
Taking a wider view, there's an appeal to "cloud components", where all components are rented - including ones as simple/trivial as this. For this to work, it has to be cheap enough to be a no-brainer (esp for projects made of such components). Say, 1/100 - pennies - e.g. 9 cents /m/e. In the long-term, you'll see free open source alternatives, and maybe even free hosting (cloud providers supply it free, to support their hosting of your actual app)... and maintained.