Everybody hates punching holes in walls and running new cables, but this is almost certainly the wrong solution for almost every problem, outside of the weirdest of edge cases.
For starters, you're going to lose MIMO, so you've substantially downgraded your network's ability to handle multiple clients. It's also really unlikely that your weird old coax system is clean and not a rat's nest of splitters and unterminated ends (=interference).
Attaching multiple antennas to a single AP in a non-MIMO configuration is not a cost effective way of doing DAS with current technology, if it ever was. More, lower-powered APs all over the place is where you want to be spending your budget. If you want to save money on install, do PoE.
For starters, you're going to lose MIMO, so you've substantially downgraded your network's ability to handle multiple clients. It's also really unlikely that your weird old coax system is clean and not a rat's nest of splitters and unterminated ends (=interference).
Attaching multiple antennas to a single AP in a non-MIMO configuration is not a cost effective way of doing DAS with current technology, if it ever was. More, lower-powered APs all over the place is where you want to be spending your budget. If you want to save money on install, do PoE.