Let's do the Maths.
Cheapest "Cloud" plan: $25/mo
Pay for 10 months for a year: $250/yr
Cost of Galaxy Tab 4: $170 (lower if with batch discount)
Minimal $250-$170 = $80 per year for the service itself
Equv. $80 / 12 = $6.67 (3.s.f) per month for the service.
This is not only feasible, but...