1819 Old Collins Creek Road. Interestingly, this is not the first time that address has shown up in this thread. Back in thread 19/post 744 (its on page 38), TIGERFINZ posted that address in relation to the towing company owned by ST. In fact, if you look up "towing in McClellanville SC" on Yelp, that is still the address that comes up for "Shaun's Towing" (formerly Zyreke's Towing).
Top 10 Best Towing near McClellanville, SC 29458 - Last Updated May 2019 - Yelp
I've attached a few images from Google Maps which show that decrepit structure in 2008. As you can see, its part of a larger property with two more contemporary houses set back from the road. Personally, I don't think this is the "stash house" from Brown's story (this is the third candidate for that location I've seen come up -- just shows you how many old, "abandoned" structures there are in that area), but its possible it had some relevance to Brittanee's case. The fire is suspicious to be sure, but may just be another odd coincidence. JMHO.