Ask HN: Testing an idea using AdWords and a landing page?

Me and my sister have got an idea for a service we'd like to develop, based on our experiences using freelancing market places.

Instead of writing a tonne of code, with a few parts involving NLP and ML, would creating 2 landing pages, directing traffic via PPC, tailored to each type of customer, which collects their emails, be a good way to 'test' the idea?