Many people planning to buy a rental property in this paradise-like destination, tend to underestimate the costs involved. One of the best ways to work out the costs is to start at the end and work your way forwards. This then would include working out the return of investment you want, should you purchase a house for rent. Keep in mind that Phuket is already a prime spot for real estate, so use the 50% rule to work out your potential net income.