Want to enclose cab and add heat to CAT crawler loader 953

Hi,
I'm looking to buy a used CAT 953 (or maybe 963).
I really need the 4 in 1 MP bucket so this narrows my choices a lot.
Also, I am farming and do most of my land clearing/maintence in the winter-- so I really need an enclosed cab--- hard to be in an open cab when it's 10 degrees and blowing!

I think I can get the heat by tapping into the engine coolant line going from the engine to the radiator (there are kits for this). But if anyone knows a better way to get heat -- I'm listening--...

Want to enclose cab and add heat to CAT crawler loader 953

Want to enclose cab and add heat to CAT crawler loader 953