Im just wondering about the car thing.
Telling him "you decide what well pay and for wich car" i obviusly handing over dominance.
If you wanted the job done and to remain in control only thing to change would be how you said it.
"heres xxxx $ go buy a nice car for your mistress and bring back the rest"
Upon delivery all you do is an inspection and evaluation of the returned cash and beat the crap out of him for bringing a car with dirty tires... (sorry got carried away there)

Having control and or dominance does not imply making every tiny decision. If it does to a partner, theyr looking for more of a parent than a dom/me, from my perspective.

Most likely that was one of the issues i/we had trying 24/7.