Memorial for my son David W. Moore

My son David lived in Long Beach, CA. On the 7 June I received word that he'd gone to an emergency room and while there gone into cardiac arrest. As a result, David ended up on life support, not expected to recover.
 I'm holding down two jobs, and living from pay check to pay check in Florida. Only through the generosity of friends and family who supplimented what savings I had, was I able to fly out to be at my son's bedside.  
David remained in a coma and I was forced to return to Florida, to work long enough to finance a  return.
On 25th of June, before I could return, David, my son, died. Mercifully, his father was with him. No parent should ever have to attend the funeral (Memorial Service) of a child, but that is what I'm here to ask once again, for help with from those who knew and loved David.