I would ask that you not start yet again on these vague and unsubstantiated accusations of illegality with regard to OPA contracts unless you have some proof. I'll not remind you again.

As for your question about the legality of the closed sessions, according to a friend at the MD States Attorney, it is a very gray area it is a HIGHLY unethical  practice.

I have no idea as to your source, but suggest that both you and your source read the Maryland Homeowner Association Act. Closed sessions are perfectly legal when certain conditions are met.

Can 100 people out of 8,000 truly lobby enough for the OPA BOD to acquiesce to the expense of $75,000 per?

YES! However, at this point the board has not done what you say they have done. The board has, of now, not approved a penny for the project. A year ago it did include $250,000 in the budget for the project. Any actual construction project would need formal board approval.