It's pretty hard to tell if it would work for you specifically to be honest, for example how many instances of each of those plugins would you be running at once? I'd be inclined to say the 13" won't be powerful enough for you. Seems like a massive downgrade just to not get fan noise, not to mention the resale bath you're gonna take selling 2 near new intel macs in the space of a couple of years.
It's a tough one mate, you could always buy a 13" to try, copy your computer to it, try it out and send it back if it's the same result. I'd be inclined to think with what you're running the 13" is gonna be cranking its fans just from CPU usage anyway