The costliest error involves taking legal advice from the other side. The seller earns money when the deal closes, which differs from acting for you. An independent lawyer represents a small fraction of the purchase and is the single best safeguard.
Putting your name to untranslated contracts is nearly as costly. An official translation is inexpensive set against the purchase price. Verbal assurances mean nothing once a dispute starts — the document governs.
Committing to an unbuilt project blindly has wrecked plenty of plans. Before paying anything, look at what the company has already delivered, silves apartments the planning approvals, and the guarantees on staged payments. Projects running behind schedule are normal even with reputable builders; abandoned sites are the exception but much more damaging.
Forgetting about resale is a subtler error. Every purchase will eventually be sold, and the pool of future buyers decides what you get back. A property management in legian with no local demand sells slowly when conditions change.
Lastly, a lot of buyers fail to plan for the ongoing obligations. Tax filings can be required even when the home sits empty, and overlooked notices attract charges that accumulate quietly. Setting up a local tax adviser at the outset avoids most of it.