Yes, they give a lot of money, especially when you have property:D
But the Order's troops are not cheap. Golems are not a cheap pleasure, of course, they are worth it, but still...
P.S. I remember when I was playing the campaign for the Order in the original 4th game (about Emelia Nightheaven), it was about dragon golems in particular, the genie reasoned that they are stronger than 20 gold golems, but I never understood how one iron dragon could defeat 20 golems, when its health is only enough for four, well, there is a first strike, but it won't save it. In general, it turned out to be some kind of useless unit, at least in comparison with the Titan, although even he is truly effective when accuracy is applied to him in combination with hobbits.
By the way, hypnosis, berserk, and blindness should also work on the dragon golem, because they are still controlled... it's somehow stupid;)