Mueller investigation cost 32 million. That is nothing in a DOJ budget of 62 BILLION.
That 62 billion is to pay salariesof DOJ staff all over the country and maintain offices and equipment all over the country. The funding was approved based on needs budgeted by DOJ. I doubt if $32 million in excess was approved sitting around in petty cash. I would think may be there is spare money for a small staff for a short time, but not a huge investigation.