All of the alternatives are meaningful, but in budget terms, the first three are the correct answer.
When buying a high-cost asset, such as a car or a home, the consumer must draw up a budget plan to make sure the viability of the business and make sure that it can afford the costs, which are long-term.
In this way, first Sara must decide between the advantages of renting or buying. This is an analysis that may involve subjective issues beyond the financial aspect. For example, the choice of the neighborhood and the city, plans of change of country, etc.
If Sara is renting, or mainly, if she buys the house, Sara needs to make sure that her monthly budget is sufficient for the costs, even in case of any setback.
Of course, the initial cost must be observed, but this is an easier analysis, since it is the present value of its resources.
