Co-work on building a website

Hi there, I would like to create a reseller webshop based on products from [login to view URL] using flatsome theme. I have used this theme before to build my own website. It's very easy to use. I just want to combine product selection method from probo in my new webshop as well. I'm open for other suggestions IF better, but I prefer this theme because I'm familiar with it and I have great results while using it. I will also do all the boring stuff for adding products etc. We could also co-work on the design. I just need to know the costs for the framework, custom css, for selecting productsand cofigure the add to cart system. I do have a friend with css experience so please don't waste our time and give me a reasonable price as he will double check the work. So if you have a creative mind, can think for yourself as my needs and goals are obvious in this case. This project might be right for you. Comment/explain your quote, I will check it tomorrow and get back to you. I also have more upcoming projects for example an online marketing website. If you have made an online marketing website before, I would like to check it as well. I have a new advertising bureau and we would like to co-work for more website projects in the future as some of my clients require websites as well atm we don't offer these services. Basically, afterwards we would like to keep good relations with someone capable, can deliver more than just the basic needs and delivers a little bit more than average. But let's focus on the probo webshop first.