Can Saudis buy more than one apartment in Istanbul

Yes, Saudis can buy more than one apartment in Istanbul, there is no legal limit to the number of apartments that can be owned.

Is it required to have a prior residence permit to buy an apartment

No, it is not required to have a prior residence permit to buy an apartment, but ownership facilitates your subsequent obtaining of a real estate residence permit.

Are there projects dedicated to Saudis only

Yes, Mbany Real Estate provides dedicated projects that are compatible with Saudi and Gulf culture and expectations.

What are the documents required to buy an apartment

The documents required to buy an apartment are: a valid passport, a Turkish tax number, a personal photo, and a bank account in Turkey.

Is investing in Istanbul apartments worthwhile in the long term

Definitely, investing in Istanbul apartments is worthwhile in the long term, especially in projects with a prime location or close to transportation and universities.