Need Help Quick- Dynasty Trade

In a 30 team dynasty league, I would trade Pedro Alvarez(5 years+, depending on his contract after the 5th year) for Mike Moustakas (would have him for 6 years+, once he gets called up). The years include this year, Moustakas would start his time once he reaches 150AB.  I have no other 1B for the future, only got Mike Carp and Tommy Joseph in the minors.  

My team in the majors right now is:

A.J. Pierzynski(1 year)

Buster Posey(5+ years) playing 1B

Pedro Alvarez(5+ years)

Alexei Ramirez(3+ years)

Michael Bourn(3+ years)

Coco Crisp(5 years)

Luke Scott(1 year+)

Brent Morel (6+ years) Utility

BN: Jose Iglesias(Not yet triggered contract)

Pitchers: Danks, Drabek, Hellickson, Santos, Affeldt, Grabow, Pena, Rhodes, Coffey

Some notables in my minors are: Kipnis, Lawrie, Lyles, Trout, Vitters, Hak-Ju, Arodys and a bunch of other spects.

I'm not sure if I should do this since I wouldn't have a 1B, but I can get one in FA.  Also I would have Lawrie coming up at 3B, but because of his defense I'm unsure if he'll stay there. I'm currently in second in my division, but don't mind to wait to compete. What should I do?