Yes perfectly feasible so long as the CPU is not especially weak, anything modern will be fine. I use a Haswell Xeon chip which was cheap because its locked to stock clocks, however its also 70w TDP also. 8 cores and 16 threads means I can mine XMR at the same time as any other function required.
I've not heard of IOTA being especially intensive but sounds feasible, so long as there is no chokepoints in any part of the system.
I didn't know about this possibility with xmr. I have tried to do XMR cpu and ETC gpu but a few minutes passed well and etc cli crashed after, so I didn't give it a second try ! Maybe my psu wasn't following
Also, thanks for your prompt answer !
Edit : I got one ryzen 1300x and one Fx8350, but I plan to buy a asrock btc to fully use my gpus.