I seem to recall reading a federal regulation that a certain percentage of all wine produced must be made from fruit/juice grown within the state of licensure and you have to get approval to use fruit/juice from out of state, not to mention that some states require approval for everything used in your wine.
I know several commercial winemakers from various states that use commercially available juice to make their wine. This juice has a label such as "Welch's, Mott's, etc." I once asked them about consent from the brand & was told they purchased in bulk from a commercial vendor & sometimes bought from stores like Costco/Sam's/WalMart and as long as their label does not say "Welch's, Mott's, etc." there is no concern. If they go to competition they disclose the brand, etc--if required by the competition. And our conversation ended with "always check with your legal team though, because the rules can change".
Basement wineries do exist in SOME states. If you live in a subdivision they may not approve or even allow it. If you have a homeowner's association the bylaws likely say "no businesses within the home". But your state licensing agency can give you the lowdown.
Do not forget anything make before you are licensed and approved cannot be used/sold in your commercial setup. Was at a roundtable discussion and a story was told about a licensed winery that used to make "personal" wine on the premises, and was supposed to be considered taxable wine. A barrel room tour was given--winemaker was asked about a certain set of fermenters that were skipped over during the tour & replied they contained personal wine "for family and friends only". This was reported they think by someone on the tour & the winery had to pay huge fines, feds were ready to take the entire winery contents and shut them down. This happened about three years ago.
I wish you the best if you do pursue moving to commercial side.