jQuery-based mortgage/home affordability calculators?

[Aquavit]

Does anyone in the group, by chance, know of any jQuery based mortgage and/or home affordability calculators out there, besides mlcalc, that play nicely out of the box in a responsive/mobile-first layout?

I like mlcalc, but it doesn't seem to provide the affordability calculator functionality that I'm really after. Others that I've found, such as Zillow's application, really don't seem to be written from a mobile-first mentality.

I guess I could write my own if absolutely necessary, but my jQuery skills are a bit light and time is a key factor for me.

If anyone knows of a nice solution and wouldn't mind posting it here, I'd hugely appreciate it!