Hi @msteveng
Welcome to Webflow and the Forum 
Sounds like you have lots of decisions to make! I think unless each of your brands/shops is separate and unique from the others, the best way to build trust online will be to have some consistency across them, either one site or similarly styled sites. Try and do some customer research about how they currently find your brand, and site, and what they would like to see.
Also think about how you will manage each one - will it cause a lot of work to manage different e-commerce solutions in each website, or should you bring them ‘all-in-one’. Webflow is working on an e-commerce solution but there is no ETA on that, however you will find solutions on the forums such as @foxy and @paywithplasso which work nicely alongside Webflow - if you PM either of them with your project details they will give you some great advice.
I’ll keep this fairly short as we are in the intro thread - but feel free to ask folk for feedback in the forum as you work your way through the decisions