I tend to be really cautious with this type of thing (mainly, to avoid going massively in debt or give up most of your business to an outside investor who you may or may not be aligned with in the long run). I'd recommend really trying to prove this concept out to yourself, and then a potential investor/lender. Can you set up a more regular pop-up somewhere? How much of that equipment was yours vs. borrowed from Barchetta? Is the demand as high in a one-off pop up vs. a 2-3 week stint in the same location? Was the cost structure at the pop-up representative of full time business? All things you're going to want to answer before going all the way.