please answer, should scraper be bought? Is 7.5% better than scraper in investment?

3. You are considering buying an excavator. The initial purchase price is $350,000. You plan on using it for eight years, at which time you can sell it for $50,000. It will cost $6,000 per year to operate and maintain, and you can generate $55,000 per year in additional revenue. If you have an investment opportunity with a similar level of risk that will return 7.5% annually, would the excavator be a sound investment? Explain your reasoning