In the earlier thread on Hoppe's lecture on the yield on money held, I mentioned an old paper of mine that used Hutt to develop a more complete subjectivist perspective on money demand. I have now scanned that paper and it is available on my website:
“A Subjectivist Approach to the Demand for Money,” Journal des Economistes et des Etudes Humaines, 1 (4), December 1990, pp. 459-71.
I think it holds up pretty well almost 20 years later. And it certainly provides evidence to counter the claim that free bankers reject the idea that held money provides a yield.