Pompey have been without a boss since Michael Appleton's departure to Blackpool last month, with Guy Whittingham placed in temporary charge of the League One club. The PST's takeover of the south-coast outfit was given a boost on Thursday when the Trevor Birch-led PKF signed a conditional agreement to sell the club.
Portsmouth are set to lose 10 points when exiting administration and are subsequently likely to be drawn into a relegation battle, yet Brown believes they can still attract high-quality candidates for the job.
"Of course it will (impact on the manager's situation). But, having said that, there may also not be a huge amount of expectation in the first year if we do get those 10 points deducted," Brown said.
"We are looking to build a team and a management team that can be successful over a number of years. After what we have been through over the last few years, I don't think anyone is going to expect things to suddenly magically improve overnight.
"Hopefully we can find someone who can buy into the concept we are trying to achieve at Portsmouth, by making it one of the biggest community clubs, and willing to get on board despite the 10-point deduction."