Yes, to us this idea of $100,000 through crime is more or less unrealistic unless he has a hefty price menu--$30,000 for murder, $50,000 for murder with cremation. $5,000 for theft of the object of your choice, add in a few fees for escorts... IMOO
The delusions of a psychopath or someone psychotic are far different. I've just come through 3 years of helping a family member with psychosis. I've been in meetings with the psychiatrist to understand it better. Psychotic delusions are when a person believes something like the mafia or CSIS or his own family members are out to get him, are following him, etc. and this person will express those thoughts, make false accusations, and even go on the run to avoid the offenders in the delusion. Unless those close to DM have seen that too, I'd put him in the category of sociopath instead. There is no effective treatment for sociopaths. MS is likely one as well. IMOO