Velan thought,

The house proudly held up a dome. Balconies with intricately carved woodwork hung down from the sides of the house; smooth, rounded pillars, deep verandas, chequered marble floors and spacious halls, ranged one behind another, gave the house such an imposing appearance that Velan asked himself, ‘Can any mortal live in this? I thought such mansions existed only in Swarga Loka.’ When he saw the kitchen and the dining room he said, ‘Why, our whole village could be accommodated in this eating place alone!’ The house-builder’s assistant told him, ‘We have built bigger houses, things costing nearly two lakhs.

What is this house? It has hardly cost your master a lakh of rupees. It is just a little more than an ordinary house, that is all . . .’ After returning to his hut Velan sat a long time trying to grasp the vision, scope and calculations of the builders of the house, but he felt dizzy. He went to the margosa plant, gripped its stem with his fingers and said, ‘Is this all, you scraggy one? What if you wave your head so high above mine? I can put my fingers around you and shake you up like this. Grow up, little one, grow up. Grow fat. Have a trunk which two pairs of arms can’t hug, and go up and spread. Be fit to stand beside this palace; otherwise I will pull you out.’

Based on the provided context, I don't have specific information about what Velan thought of a beautiful mansion. To provide an accurate answer, I would need access to the text or source material that mentions Velan and a beautiful mansion.