The real question is, how much are you willing to pay? Guaranteed internet speed, even a fixed landline, is expensive, since it IS expensive to prioritize packets as most ISPs are over capacity to reach economies of scale and make a profit. Cellular is even more expensive as frequency bands are limited.
In my city, a 30mbps home internet is around ~$30 a month. Obviously that's best effort, no guarantees. Meanwhile, a dedicated business internet of also 30mbps can cost around $400 a month or higher.