The bite of the AR bug is a serious one
Getting the right tools certainly makes life A LOT easier and are fortunately fairly inexpensive. That said AR-10’s and AR-15’s both require their own blocks but the wrenches or generally interchangeable. For those that do not have a bench vice they are now making jigs that you can bolt down alleviating that need.
As far as build ease goes I am totally converted to the Aero Precision M4E1 lower as the two pins that generally cause the most damage and frustration have been eliminated. They cost $20 more and save a least that much frustration on assembly.
If I ever get around to building a “serious” SPR platform I may try a drop in trigger. Personally I’m hoping for an AR-47 kit for Christmas as I can hunt with it here. Well at least for the moment, depending on what our good Governor decides he is willing to shove down our throats come January