The cost of college, pregnancy or other expenses after age 18 were not factored in. The overall cost is a good deal higher than figures estimated in 1960 by the USDA's first Cost of Raising A Child report.
It's reasonable, but there are options. A garage door opener is anywhere from $75 and up for a single door and $120+ for the double.... Installation price depends on who does it. I think Sears and/or HD charges around $250+, but you have to buy the GDO from them... @_@ I'd say do it yourself. The contractor is out to make more money, guaranteed.
How much does it cost to install a garage door? To install a single new garage door it should cost between $500 and $800. They demonstrate that the average homeowner can usually tackle such a project in a nine hour time span and a professional will be able to complete it in roughly five hours.