So, update: I broke down and bought a Philips Lumify ultrasound (msk one with the 12-4 probe, obviously) for my solo office... was gonna wait until year end for tax reasons, but the new office has been busy and profitable a lot faster than expected and rep gave me a good deal vs sticker price.
I will say the Philips puts Butterfly to SLEEP.... it's not even comparable. The Lumify is a lot clearer and higher quality imaging; it's not even close. It is like Butterfly is a kids' toy while Lumify is a real medical device. Apparently there a few comparison studies with
same conclusions of Lumify >>> the rest of POCUS makers for various ER, OB, cardio, etc applications also (I guess the VScan by GE is also pretty good, but I've never used it and not sure how affordable it is). Butterfly recently and another brand Esoate back in pod school (good, but big and expensive) was all I'd used until this month... night and day difference.
The Lumify does cost almost twice as much ($6k retail, can get it for $4k to $5k from big company reps... no fees or subscription afterwards on the Philips), so I'm sure that bigger up-front cost is why Butterfly is still so popular with DPMs. And yeah, they all bill the same, obviously. If you want to just bill for PF or first MPJ injects that don't even need u/s to begin with, it probably doesn't matter.. but for real visual quality (tendons, ligaments, etc), definitely look into the Lumify.