It should work OK. You will need a little patience to prune the 50 Mhz
antenna length to resonance.

To reduce the coupling between antennas you could allow the 50 MHz
dipole to droop a little in the form of a shallow inverted-V.

Just progressivly increase the lemgth of the hanging insulating
strings towards the end of the 50 MHz dipole. It doesn't matter if the
dipole has curves in it.

I hope I have correctly judged your setup.
----
Reg.