I may have mentioned before that the long distance transfer of monies was dangerous business back in this day. Not only did the actual envoy have to be fully trusted, I assume that diversions and disguises and stealth's had to be planned to avoid being robbed. Larger volumes of money may have to be sent out by multiple and less obvious means. A charitable Christian church was no doubt a target for thieves and a good place for them to plant conspiring informants. Paul's public announcement may itself be a ruse. This is my hunch and not a revelation. Would it be wrong if he did?
2012 - pBiblx2 Field Wise Bible System Version 2.0.9d - GPL3