I think you'd find that, assuming you use the printer a fair amount, that the TCO (total cost of ownership) over about 18 months is about the same.
Fact is, the cost to manufacture really isn't that different. Some, but not a lot. It's primarily due to the fact that the manufacturers figure a laser printer is more likely to get used in an office situation and they have to build it to stand up to heavier use, or lose their shorts on warranty work.
But an inkjet goes through far more by way of consumables, namely ink. There's a lot more competition for inkjet printers in the marketplace, and so the printer guys have resorted to the strategy of practically giving away the printer and then killing you on the ink cartridges, which are almost pure profit.
Sure, the refill guys are always around, but the printer manufacturers are constantly looking for ways to thwart them, by making it difficult or impossible to use anything but their own high-priced spread.
By the same token, in that year and a half, you may still be using the original toner cartridge from the laser printer, and a "remanufactured" one for a lot of the popular models doesn't cost much more than the arm and a leg ink cartidges for an inkjet, and gets about 10 to 20 times as many pages.
Now, print this 500 times for future reference