IMO and IME in the top A show barns either in Virgina or Florida, it was not an unreasonable lease fee. I know that seems bizarre to folks with modest competitive goals or pleasure horses, but that is a fact of the business.
Back in the day, it was not unusual to $5 - $10 grand for a one month
lease for a horse to qualify you for indoors; I have no idea what the going rate on that is now.
I understand that people are surprised and baffled by the costs associated with A rated showing, but I truly don't understand the hostility towards posters who compete at this level.