This is certainly an option, but to get the same level of skill diversity, quantity and quality of work done in-house you would need:
1 x Senior UX/UI Designer with an average monthly salary in the UAE of AED 28k.
Not only would it take time to interview, validate and process the equivalent high-calibre senior UX/UI designer in the region, but their total average monthly salary would be in excess of AED 28k (plus benefits etc).
So, for a fraction of the cost and stress, we could be working on your first high-quality design request within minutes.
It's a no brainer and makes complete business sense.