I'd keep in mind that cloud providers have well-known IP blocks that can sometimes be rate-limited by various internet sites/services, primarily to combat botting. You might inadvertently get caught in the IP range that's being actively rate limited by e.g. Instagram. YMMV.

Absolutely. Look for project Streisand.

https://vultr.com might provide more bang for the buck at $2.50 a month for 500GB in bandwidth.