Keeping the previous owners training budget can be used by a commissioner as a "selling point" for taking over a team before the end of a season from a departing owner
(have a couple of these available in Sandberg - see classified). However if the team reaches the rollover the present situation is the budgets reset to 10M in each area and that team will be at a significant disadvantage to the rest of the league, particularly if the team is "older" or "younger" than average (as relates to training budget).
I understand the concept that the 4M year to year limit is there to reflect the reality that scouting departments are not "born" overnight. But neither should they be lost (or gained) overnight. It is somewhat unrealistic that a team that may have had a 20M training budget or 18M College scouting budget (or 0 Adv scouting budget) esets all the way to 10m in each area. WHY NOT MOVE THE DEFAULT BUDGET components up to 4m CLOSER TO THE MEAN when a team changes ownership (to reflect the lose/gain of some personel) and let the new owner work from there (rather than all 10M). This would be more realistic and may give the new owner more flexibility. Thereby making it more desirable to take over a team at the rollover.
as an example my present No Quitters budget is
rather than becoming all 10M 105 10 10 10 10 10 10 10 10
the default budget would become 99 10 10 14 14 6 4 16 12 if there were a new owner (which there will not be)
and for the coming season the new owner could move 4M from these numbers (at the extremes could get Adv Scouting as high as 8 (or back to 0) and training as low as 12(or back as high as 20))