the TT-303
is produced by Cy
and i don't think you have to own the machines in order to make surface-mount stuff, afaik there are companies which offer such things, you just supply schematics and stuff and they build the things
but that's not important
even if these things become really cheap as you say, you can't compare it to a 303 because while the 303 has schematics in the manual, the TT-303 doesn't
and i doubt whether the components are even labeled on the PCB
this all means that if something goes wrong with it - it won't be very simple to repair
now if you had problems with a TB-303 - you can always ask someone familiar with x0xb0xes because 99% of the things are the same, and vice-versa
you can send it to repair, schematic is available.. etc..
or you can repair it yourself
this aspect IMO is important