Manual follow/unfollow Method no Proxy question

I ask this question because i like, working manually rather than bot, and also gives me more control and less risk on accs, now i want to push it to the limit and see if its worth it to get a second sim and phone,

i have read of ppl working with 3 accs up to 5 acc on one phone, is it possible to manually grind follow/unfollow method like this:

have 3 accs open on phone,
follow 60/hour on acc A
sign off acc A ,
close app
turn on airplane mode, renew ip
log on acc B
follow 60/hour on acc B
sign off acc B
close app
turn on airplane mode, renew ip
log on acc C
follow 60/hour acc C
close app.

and work on this within one hour?