Ronald's decision is realistic; taking a loan will increase the cost of a purchase he pays for in another manner.
All loans charge interest. It only varies on the interest rate given. It also charges additional fees in the event monthly amortization is not paid or is paid later than the agreed upon date.
When you purchase an item, it is better to pay for it in cash rather than pay for it in credit if you know it is impossible to avoid getting charged for interest. It is better and practical to save up for the purchase.