If you take the parts from used car for LOW money and do it by yourself 2k could be possible, plus some days of work
.
The cam alone is about 3k6 new, iirc.
To say it with the words of my beloved old friend Dr. Frank N. Furter:
Don't dream it, buy it ...
I don't know about tax-addition in Sweden, so I can't say, if 68k all-in is good at your site. But 100k on a N74B60 is NOTHING to care about, imho.