One of my client's website will become live in may/June. But he wants to start off page SEO work from April. So I can say initially for 2-3 month it would be only home page with somewhat text and inquiry form on that. Initially we can start with local company listing etc so till when their website become live their website can rank on some keywords or at least can get referral visits. It can have any negative impact or can be harmful anyhow?