30a = 3600w. 50a = 12600 w potential Power mizering is a lesson we learned long ago.
Turn fridge, furnace , cold water heater to propane. You now have most wattage available except for the small drain for lights tv and such.
What this means is you can run 2 power hungry devices at a time, like 1a/c and hair dryer, Toaster and coffee pot, and so on.
Not 3 .
A/cs typically draw 12-15 a on start, run at 10-11a Thats yes you can run 2 a/cs on 30a IF you have reduced all other load.
If an a/c runs at 12a usually less, thats 1500watts. 2 is 3000watts leaving 600 w for incidentals. just fine.
You cant hurt anything just trip a breaker that reminds you you forgot to shut something off before you tirned on something else.
Learn to proactively manage your load Many years on construction sites or on a friends back yard and we have run 1 a/c on 15 amp many times.