For 100 liras, you can enter the territory of the Resim Muzesi Museum and look at the same gate and the Bosphorus. There is a magnolia pond in the garden courtyard.
At the ticket office in the palace, the Turk offers to take you to the same entrance, but for 300 lire.
You will not be able to get from the museum garden to the Dolmabahce garden, the security guard scans the tickets.
A full ticket costs 1,500 TL, if you walk further along the fence about 400 meters, there will be an entrance where you can only pay for the territory of 100 TL, near the main cas the Turks can intercept you, offering 300 per person for the same entrance, do not be fooled.