This is all happened in Arizona

Thanks, once again.

will say he took the apt. off the market because
he relied on the signed contract.  L must try to mitigate his damages by making a good faith effort to rent the apt. to someone else by advertising it, etc.  L can't let the apt. sit vacant for a year and then sue you for the rent.

If L rents the apt. by 05/08 --no harm no foul. L can't collect rent from 2 people for the same apt.  If L can't rent it until June, you'd be liable for that loss of rent.  If L rents it for less than you agreed to pay, you'd be liable for the difference in rent for the term of the lease.

Blah, blah, blah -- in the real world, landlords don't have time to mess around with trivial stuff like this.  They move on to the next tenant, unless they're vindictive bastards.

Calif. law, not AZ, but should be similar.

If you have cause, it might be easier to get out of...  like misrepresentation.  
I'm not sure if the 3 day rule applies, check with consumer advocates quickly.  Some major purchases you have 3 days...  not sure if it applies or it may be state laws.

I let a tenant out of a lease when it was apparent they could not afford it.  Better to re-rent it to someone who could pay on time.

I signed the lease, got the keys and went upstairs.  The place was clean but full of cockroaches.  So many that the very next morning I went to the office and tried to get out of the lease.  They said no and I had to give 2 months notice and I still had to pay for the apartment untill it was rented out, which they are in no hurray to do since they were getting my money.  I was furious but there wasn't anything I could do.  I hope you find a way out of yours.  Good luck.

If there really is a health issue, call the local board of health & get an inspection done.  A college student/family member had this done.  They got a pro-bono lawyer (lucky) and won in court.  I don't know if they'll get their deposit back like the court ordered.  They could not have won without the letter from the health inspector who stated the sewerable backup had not been cleaned up properly...  (not their doing, clogged line in the street.)
skb