What is the best property for rental yield in Dubai?

The best rental-yield asset is not automatically the cheapest or the most luxurious. 
Investors usually do well when they buy a unit that is easy to price, easy to lease, and easy to resell, such as a strong studio or one-bedroom in a demand-led location.
Yield weakens when a unit is small but overpriced or burdened by heavy annual charges.
That is why investors should look at net yield after service charges and vacancy risk, not just headline rent.
Practical products often outperform visually flashy ones when the objective is purely investment-driven.