D will always vote no, as if he is the last one standing, he will win 10 gold.
C does not want you, A, B AND C eliminated, because in that case he would lose to D.
So C will vote no until B makes his offer.
B knows that his offer will probably be accepted. When he makes it, C will accept so as not to stand alone against D and D will reject it, but his vote will make it pass. So for maximum gold, he will vote no (unless made a good offer).
A knows that he is next on the line, and B, D will NO him, but as A, C get 50% of the votes, his will probably pass. So he will probably NO.
So you are doomed
Since D will always vote NO, offer him 0.
To get C's vote, give him 4 gold (more than 1/3, which is what he can expect at most from BCD)
As B will want to make his offer, give hiim 0.
A will probably be won by 4 as well.
So an offer for 2-4-0-4-0 would be my bet. You get 2, which is not too much, but will do