I ran it as well as instazood back in the day, always use from my home address / IP and if working for a client I would send them a mini PC (at the time I used basic celeron x86 mini PCs, cheap NUCs) and let them run on a schedule from their IP address, and I never touched it on my phone unless on wifi at home and with automations disabled. Created some pretty huge accounts with automations which are still running today and working fully organic now.
Try to make the automations look natural - so whatever IP you're using to post and build the account should also be used for automations. If IG suddenly see's you posting from a different IP it will be flagged and they will shadow ban/limit your account. Also don't over do volumes, and make the timing as random as possible. Also do not run automation alongside your posting, pause F/UF and post, then resume F/UF.
I would also look at DM autoresponders - when they follow back genuinely thank them for following, make it appear human and do not sell anything.
I ran this for a clothing manufacturer and I added an automated DM that said thanks, and said that I'm trying to build a business and wondered if they were interested in influencing for the brand in return for a big discount (like 50-80% off RRP), I'd then apologise for not being able to offer them free clothes right away as I was building the business on a shoestring etc etc. Keep it genuine, use multiple word variations to make the DM look as natural as possible (literally had about 300 unique variations/combos in total for the auto DM responder).
DM linked to LP with sub form, when subscribed the upsell began, plus FB tracking pixel would retarget/remind - add them to the FB funnel with 3 months worth of retargeting stack to conversion. Did £200k per year on that method alone for a £12k FB ad spend (instazood was dirt cheap too, $75 per month or there abouts)
If you want help to set this up for your brand and sorting the marketing stacks, DM me.
Tread carefully if using automations for a money IG account. One slip up and they will shut you down.