This is the plan I currently have a nice chunk of live rock from Ken set aside. I'll gather some more from some member's tanks once this thing gets wet. I was hoping to get some from Mike, but again, he's tankless....I've started more tanks than I can remember for my short time in the hobby. Every tank I started with dead rock went through all the uglies (I have one I'm doing now that just got past dinos and now has hair algae all over) and would get random coral deaths. Any tank I've started with mature live rock I've been able to do whatever I wanted (to a degree) on day 1 and not have the same issues aside from new sand added going through uglies.
My experience with bare bottom tanks along with many others is that usually the rock scape alone isn't enough to support the biome and either bio blocks or a sump full of live rock are needed to make it stable and not have nutrients swing all the time.
I used to always just keep a bunch of live rock in my sumps and would trade for dead rock with people I knew who are starting out and then throw their dead rock into my sumps. (I currently have a bunch of rock curing in a 33gal brute but they aren't ready yet.
The main issue with buying live rock is you don't know what pests you may get. For an experienced reefer that usually isn't a huge problem as most all pests can be dealt with. For someone new in the hobby any pest might just be the turning point that makes them give up as it's hard enough to learn everything needed to keep a good pest free tank going.
I'd definitely find some clean live rock from any members and use as much live rock as possible and supplement any more needed with dead rock.