Not imposible but i think the problem it's if you remove all the people what it's left of the picture? Whats the point on recreate and empty room with a plant? it's easier just cut you off of the picture and add some new background i think .
For your information the members here @PSG don't mind doing free edits and we do this in our own time and I might add free of charge.
Maybe you should consider thanking the people who made an effort to help you with your request,