Hi,
Hope you are doing well. It's nice to hear that you have developed websites for your work and it's brand new. Being a a Forensic SEO Auditor and Internet Specialist I think I can surely help you.
I have my own process of work starting from SEO Audit and Strategy development to keyword research and planning to Onpage SEO to Strategic link building work.
Generally it takes 2-3 months to see the effectiveness of the work and the budget depends on project demands and requirements. It's not possible to say the budget upfront but can defintely tell you if you give me the URLs of those websites and your requirements.
I would love to help you.
Looking for your response.
Thanks & Regards,
Dinesh Roy
Internet marketing Professional kolkata