For those preparing for IELTS because they want to study abroad, how early do you start researching accommodation and living expenses in your destination country?

I have been thinking about how much planning is involved after the exam, from university applications and visa requirements to finding a suitable place to live. Housing costs can vary significantly between cities, so I imagine it is important to understand the local market before making any major financial decisions.

For someone considering a longer-term stay or eventually buying property abroad, would consulting an independent real estate advisory professional be useful, or is it better to start with university accommodation services and local rental listings?

I would appreciate hearing from anyone who has already gone through the process. What helped you estimate your housing budget and avoid unexpected expenses when moving abroad?