Another thing to consider is, do you really need to use it? Once I hooked up my hardwired EMS, I can now see that running my AC is about 9 amps (after the initial kick-start). In theory, you should be able to run both Acs on 30 amp, as long as you're not simultaneously also trying to run other high usage appliances like the water heater on electric.
I know a lot of people point out the whole 30 total vs 100 total thing, but really, my rig (albeit with single Ac) doesn't even use anywhere near 30. The two legs combined, in normal usage, is less than 20.
There's no use crying over spilt milk... unless it's on your keyboard.