Ongoing product listing creation for FBM Amazon/Ebay/Walmart, prefer PPC, SEO & possibly Wordpress

Looking for an e-commerce specialist for an ongoing relationship to help build our online presence (currently Amazon FBM, Ebay, our own website). If one specialist is not skilled in all aspects we are open to having two (for example: one for product listings, another for PPC & SEO) We are a husband and wife team who currently own an aftermarket automotive in-person small business and want to expand selling our own products online, however, we simply don't have the time or knowledge to build it successfully on our own. This would include: Editing product images (& videos *if* possible, but images are a must) Creating optimized product listings (Amazon, Ebay, our own website and potentially adding in Walmart & Etsy) Create ecommerce pages/products on our own website (Wordpress & Square for payment processing) PPC campaigns & marketing on all necessary platforms We value good communication We already sell a small quantity on Amazon and Ebay. Once the initial flow of work is understood & established for each product it can be repeated for very similar listings in an ongoing nature. We will continuously be designing & prototyping more products to add but not in high volume each month. Amazon, Ebay and Google PPC campaigns will most likely be vital in our success so we want to work closely with someone who can optimize our ROAS. (Extended due to family tragedy)