getting targeted followers

I want to acquire followers from different cities. I'm using hashtags on posts for each city I want to get followers from. It's working ok.. I don't think mass follow will be an option for me.

Any ideas on how to do this? I'd appreciate any feedback

My own shout out group

I am about to buy a 237K account. I'm considering buying up a bunch of 15-50K accounts to use as a shout out group for my main:

I'm brand new to IG so I'm not even sure this is a good idea. Any advice here?