The bikini line option is definitely more affordable upfront since it covers less area, so that's a legitimate choice if budget is tight. The sessions are shorter too. But here's the thing, if you think you might want Brazilian eventually anyway, you could end up spending more money overall by doing bikini first and upgrading later. That said, plenty of people are totally happy with just bikini line removal and never feel the need to go further. It's a personal preference thing combined with your budget.