Paul not getting money or anything material supports what I said about Paul had nothing to gain by being an apostle. Paul not agreeing with other peoples ideas doesn't mean that he had anything to gain from believing in Jesus. Paul’s Martyrdom: Killed For Believing Jesus Appeared To Him | Reasons for Jesus
The apostles didnt receive the information that Paul received by Jesus when Jesus was in the third heaven for the same reason they didnt receive what Paul wrote about in his epistles. Paul came after the apostles. Pauls writings are part of the New Testament because the Bible wasnt complete when the four gospels were written-there was still the writings of Paul and the apostle John to be included in the Bible.
The Synoptic Gospels refer to the writings of Paul even when it causes problems. The big trial of Jesus scheduled by the elders complete with witnesses
on the first night of Passover is simply impossible. Mark took Paul's narrative about the Lord's Supper and the Passover sacrifice image Paul uses and the Paul's comment about the night Jesus was betrayed and made it into a Passover Seder. Dramatic image and a chance for Mark to weave in his clever hidden allusions again. But in terms of Jewish religious practices and sensibilities quite impossible.
We also see references to Paul, and not friendly ones, in Matthew where Jesus is a special person but not a god, which would be anathema to Matthew's Jewish Christian audience, and in stating that the Law would stand until the end of time, and in saying that the church was founded on Law following Peter, the Apostle to the Jews, and not Law abandoning Paul, Apostle to the Gentiles. Luke connects with much of Matthew. It is clear that the Gospels were written after Paul.
The last we hear of Paul in his letters is that he is going to Rome. Tradition has it that Paul died in Rome under Nero. Suetonius tells that the Christians were killed en masse in large numbers as they were betrayed by others. I see no reason to doubt that.
In addition, Mark, Matthew and Luke clearly refer to the historical destruction of the Temple in 70 CE with increasing delay times put forward for the end of days. We can see apparent references in Mark to the persecutions by Nero in 64 CE and to the siege of Gamla in 67 CE.
The Gospels were written after Paul. The original Jewish followers of Jesus did not preach the same gospel Paul did and that this original Jewish Jesus movement lack very significant elements that Paul introduced supposedly on the authority of Jesus in heaven,