Where are you actually? I've found the Vapor Shark in Hallandale to be okay, but I've never gone to them for building advice. There is a company VaporLife that has a couple of stores in Broward (I know he has one across from the Broward Mall and one in Lauderhill). They are helpful, good at rebuildables, but also "sales" heavy so expect them to really try to upsell you. I know that there are a couple of others on the east side of the county, but I'm from the west side so I've never visited them. If you go to the Florida Vapers forum on ecf and click the south florida vapors, there are a couple of forum threads on good shops from ecf members.