Instagram additional acct questions - proxy, phone verification

Hi All. I am new to this forum and to this world of IG marketing. I am using Jarvee to run three accounts - my two kids and their band. We have been having good success so far but are looking to expand and create a few "fan accounts" that I can also use Jarvee on to feed followers to their main accounts. They do not sell anything (yet) and just want to add followers so their music gets noticed. I want to make sure I do this in the safest possible way because I do not want to get their accounts banned or flagged. I read that I can create up to five IG accounts from my phone, but I worry that if that uses the same proxy it will be a problem. Also, if I am asked to phone verify, then can I use the same phone number? I only have a personal account from my phone that I do not post on much, and I recently added their band account so I can help them with managing the DMs.
Is it safe to add three more accounts from my phone? Is it safer to buy proxys and buy aged accounts so they cannot be linked to me or them? I plan to add these new accounts to Jarvee, so I worry about phone verification if it comes up. What would you guys suggest? Thanks so much.
Laura

1.Don't use Phone Verification from the same number. Use smspva.com hidemynumbers getsmscode.
2. Buy proxies and QUALITY accounts
3. Never associate the fan accounts with master accounts in anyway.

Thank you so much! I bought proxies from highproxies but I just posted a new thread about a few accounts that I am unable to post on. Do you have a good vendor for good IG accounts to buy?

I dont buy them, i make them myself.