With 38 modules you can assign one to each frequency and SF combination so the range issue doesn't apply.
The RF interface problem? As long as you make sure all your modules only either receive or transmit - and ideally only one transmits - and never have both happening at the same time it should be fine.
I mean you only really need one antenna to receive - though it will take some effort maintaining the correct impedance - and as in real SX1301 gateways you can then have an RF switch when you need to do a transmission.
So yeah it's not easy, but debunked? Far from it.