N1b Thanks, this worked great!
FYI for others in a similar situation - Signal will refuse to send SMS verifications requested from the same IP in a short amount of time. So make sure to use a VPN and switch VPN servers with each new Signal / Molly instance.
I can vouch that smspool.net is good about sending refunds when a temporary number fails to receive the verification code via SMS.
Overall I managed to set up 10x profiles with Signal for under $3.00 USD. 🤘
Thanks y'all!