First, I was only referring to deals involving Reyes only. It's pretty obvious that no one needs to make much of an effort to acquire Beltran. But it's not like we're going to demand value or leverage from the Mets for the privilege to have Beltran off their books.
1/4. You can't have your cake and eat it - if the Mets were so desperate to dump salary this year, AND they were in trouble for future years (as you would suggest by arguing that the deal proves they're in deep s***), there's no reason to leave Wright untouchable. But if the Mets aren't in so much trouble for future years, I'm sure they can afford the $3 million Reyes is due for the rest of the season.
Also, the stake in the team was sold without anything from SNY, which is a major part of the Mets revenues (maybe even the most lucrative parts). Which explains why they had to cut a pretty terrible deal. But that doesn't mean they sell off any player for mediocrity.
2. Acting quickly doesn't matter, at all. If the Red Sox make a move, other teams will also make a move. If the deal gets done 20 games faster, the Mets save about 15% of Reyes' salary.
3. Like I said above, I don't think Beltran matters at all in terms of this trade. I'd think of it as two deals, basically - one deal for Beltran, and one deal for Reyes. Any team can acquire Beltran for very little, and I'm sure that there will be some suitors. But giving up Reyes could possibly cost the Mets more in monetary terms than keeping him.