Boiler Out in 13 unit building *Quote at 31k* Good?

[Ryan Yee]

I have an apt building in Chicago and the boiler keeps going out. We have fixed it a couple times but feel like it will keep going out. 4 Season Heating said it will keep happening unless its replaced. Quote came in at $31k at 0% interest for 4 years. That covers 4 years of services too. Does that sound reasonable? Waiting for other quotes but want some opinions. Let me know, thanks.