I don't think it's a "must" have under any circumstances. One could punt domestic, IFA and ADV scouting. 0 across the board, concentrate on FA and hope to hit the lottery in the draft every now and then.
6m for coaches/prospects. 20m for medical/training. 52m plus 133m for payroll. That's a legit strategy. One I might actually employ. In fact, 9% of my 146 teams have exceeded 120m. That's a hop, a skip and a jump to 133m. For a 0 medical disciple, 153m in payroll.