How can I multiplex my oscilloscope probes?
Coaxial switches, available from places like teledyne and dow-key, have bandwidths from DC -> 20GHz or more, low insertion loss (~0.2dB), 50ohm impedance, long lifetimes, but have slowish (~10ms) switch times and are comparatively bulky and very expensive. They cost upwards of ~$100 each for a single SPDT switch. From my research if you really need DC-high bandwidth they are the only game in town but are extremely expensive to build a switch matrix out of. That said it's most likely going to be much cheaper than purchasing more oscilloscopes if they meet your need. 

I would diagram in detail what your switching needs are, insertion loss and insertion delay requirements, determine your bandwidth needs (with timing measurements and a pulse gen do you really needs down to DC? Do you require 50ohm impedance? If not then you probably don't need the bandwidth of coax switches), and go from there. The best and cheapest solution you can get away with will depend largely on those factors.