I like it too. I have a Nikon D200 on the shelf that never gets used anymore. I think I can get it converted for around $275. Is it worth it? I don't know. How much would I shoot IR? Probably a lot more than it is getting used now. This image has inspired me to look into this. Nice work and great composition.
I have a D200 and a D700. The D700 sits at home doing its nails. Why? I don't really know; the D200 just seems to keep out of the way, even thought I can't accuse its sister of anything specific except being less gritty about life at higher ISO.
Perhaps it's the fault of the lenses: they seem to suit the crop better as focal lengths, at least for the optics that I have from 35mm upwards; 24 is still better on FF.
I wouldn't dream of adapting a camera like that. IMO, IR is like all gimmicks: a trick that does zero for a lost imagination. Cokin made a fortune some decades ago fostering fake as creativity, when all it is is shield, deflection of awareness of lost momentum. Politicians employ such devices all the time.
;-)
Rob