It is an investment, not to mention there's nothing wrong with paying a little more for something that's built well. I like the looks of hotbox incubators but their 24" model (no clue what the measurements are) is 50 dollars more and holds 8 instead of 12 tubs. Oh and they charge 75 more for shipping. So you spent 125 less and got 50% more space, pretty good in my book.
Edit, nevermind the hotbox comes with a thermostat, still about the same price for 50% more tub space.