Solar Hot Water marketing

I am slowly moving towards wanting to market my new Wix web site and generate some sales. It sells off-grid solar systems, particularly a proprietary system that uses surplus solar energy to heat water in an electric water heater. I will be further updating it at the beginning of next week, but that is not a major job.

I am now looking for the following services:

1)Review and optimisation of the current SEO within Wix;
2)Non Wix SEO services;
3)Design & implementation of Facebook and Google Ads campaigns. I know that FB and Google campaigns can be created from within Wix, but from memory that is an expensive option.

The person chosen must have proven WIX site marketing experience, and will be invited to keep the project under permanent review and update within the Framework of a monthly retainer. Please bear in mind that I am an experienced Wix developer and have many years basic internet marketing skills, but this is a bigger project outside my current comfort zone.