Ive been living in Tbilisi for a while, and before settling I also went through the same rent or buy confusion. One thing that helped me was checking different listings and comparing neighborhoods more carefully, especially because each district feels quite different in terms of lifestyle and pricing. A useful place I used during my search was https://kalaki.ge/en since it gave a clearer overview of available options and helped me understand whats actually on the market rather than just guessing from random ads. In my case I rented first for about a year in Saburtalo before even considering buying, and that gave me time to understand the real costs, utilities, and which areas I actually liked living in long-term.