With a season full of injuries and disappointment, Bo's not going to get traded with the intent of being extended by anyone, let alone as a rental for this year. The best play would be to get him as healthy as possible, get his value up and trade him next season as a pure rental.
I don't like the idea of Vlad being a rental, he's too valuable. They got to make a solid stance, either trade him this season while he's playing well and get a great return or try their best to extend him with the fewest trade clauses possible.