Growing Instagram help.

Hello Guys/Gals

So i have recently started looking into the "marketing" side of Instagram and looking to delve into it and eventually monetise accounts and earn a regular income, now i have started a niche page and its starting to get followers (around 100 in 3 days) & now that I'm getting more serious with it I'm looking for help on the more technical sides of things to make sure I'm doing everything correctly now while I'm still in the beginning stages. I am aware of such programs as FL and have just started to use Instagress to "get my feet wet" in the whole experience.

So to start with my questions are -

Should i be buying accounts?
Should i use a VPN or Proxy to open and use my accounts?
I have opened my current account on my home internet not using a vpn or proxy, will it be ok to continue?

Also

Rough amount of time it takes to reach 50k followers? (obviously depending on niche)

Thanks in advance for any and all help.

1) You can depending on what tactic you want to use. If you want to be spammy then buying a lot of accounts is necessary, but if not you can create them yourself.
2) You should use a proxy depending on the number of accounts you have, 2 for every proxy tends to be what works best.
3) Yup! You might also have a dynamic IP anyways so your IP will change whenever you restart your router, and instagram isn't about to ban an entire IP range.
4) Depending on how you grow, probably a bit less than a year if you are using botting software, quicker if you do S4S.

The previous reply was good !
So it depends how many accounts are you gonna to create/promote.
How much time takes to get 50k followers for 1 account, so with instagress i think it will take longer, but if you do a good job, i think it should take about 7 months, if using only massfollowing method to promote.