The flaw with this plan is to assume you can just put an inkjet on a shelf without it clogging, and then if you use the printhead on the cartridge type inkjet, you are often faced with replacing all your cartridges.
The flaw with most prosumer color lasers is you have basically four color drums printing in sequence, a complex mechanism required, and then when the toners run out, most people buy OEM replacements, and the sum of those four replacement toners exceed the original cost of the printer. And as was pointed out, color Lasers simply do not do photo printing.
IMHO, the only way to beat the consumable costs game is to refill your own inkjet cartridges and print often enough. Quite easy and supercheap with the older non chipped canons using the BCI-3&6 cartridges, and now almost as easy with the latest generation Canons now that the chip is cracked. And chip resetters are now available for $30.00 or so. But better hurry, because Canon, now that their chips are cracked is going to bring out a new and harder to crack generation of chipped printers.
And in my case, because I seldom print, I bought a used brother all in one monochrome Laser, but if I need color, I use my wife's Canon ip 4000 inkjet. And if my wife needs a lot of copies quick in monochrome, she can use my laser for the speed, but we can both print to the inkjet for far less consumable costs per page. In fact she can do plain paper color for less than my monochrome toner costs per page. And my wife normally prints enough to keep her inkjet printhead clog free anyway and using dye based ink for black text helps seal the deal.