The biggest one remains taking legal advice from the other side. The developer gets a commission when the deal closes, which is a different interest than acting oba real estate for sale you. Separate legal representation costs a small fraction of the purchase and is money well spent.
Putting your name to untranslated contracts is nearly as costly. An official translation is a small expense set against the sum being committed. Verbal assurances will not help if the written contract says otherwise — the contract is what counts.
Purchasing off-plan on trust has wrecked plenty of plans. Before paying anything, look at previous developments, azores houses the construction licences, and the guarantees on staged payments. Late deliveries are common with even the best developers; unfinished projects are rarer but far worse.
Thinking only about the purchase is a subtler error. A home bought abroad has to be sold or passed on at some point, and the pool of future buyers decides what you get back. A unit attractive only to a narrow group is harder to move when sentiment turns.
Lastly, many buyers underestimate the running costs. Annual declarations can be required even buy property in guria years with no rental income, and late filings lead to fines that grow over time. Setting up a local accountant at the outset prevents most of it.