A few noob questions regarding proxies, emulators and efficiency

I'm pretty much a noob when it comes to network stuff, but I'd love learn more so I can make better decisions.

1. If I have 10 phones, all running their own IG accounts. But all the phones are connected to the same wifi. Is there a chance that the whole range of addresses on my wifi will get banned?

2. Can anyone share their experiences with creating IG accounts on emulators (Bluestacks/DuOS)? I assume that the deviceid will get the accounts flagged one way or the other. But I would like to hear from someone who has done this.

3. If I buy 10 quality IG accounts. What would be the downside of managing them on different emulators, besides the personal preferences e.g. If I run 10 emulators in 10 different VM's (not simultaneous) to manage 10 different accounts, is this something that could be flagged by IG? If the answer to question 1 is yes, then I understand why it would be. I might be overcomplicating things here, but have a bit of patience with a noob I'm trying to figure out what the best way is to run multiple accounts without using bots. Buying 10 cheap phones isn't a problem. But getting 10 plans with them starts to become excessive when I'm just using them for IG.

3. What makes a proxy good for IG? There are tons of providers out for proxies, but I'm not sure what I'm looking for. I even see a certain provider selling 'special IG proxies' at what seems to be the highest price I've seen yet. I understand what a proxy does, but besides exclusiveness and speed, I don't understand what seperates quality proxies from poor proxies.

4. Any advice on where to get the best price over quality proxies?

1. Getting banned is very unlikely. There are schools and universities that run from a single IP.
2. Never done that (use my own bot), but emulators are a popular alternative here.
3. Device ID and GUID will change. IG will see a login from a new device. If it will be a problem, depends IG internal rank of the accounts you bought. Were they flagged already? Did they receive a ban a few times? Which bot was used to create them? I'd install 10 emulators and create completely new accounts there. (Note, you cannot create more than 5 accs per day per IP. If on ADSL, just reset the line and get a new IP.)
4. It is a common misconception that you need proxies. If you stay under the radar (you don't do 1mil mentions from the same IP) then you're safe.

TIP: when installing IG on emulators, get different IG versions for every emulator. (There are app archives in the internet where you can download old versions).