I read through your posts, and it looks like you didn't do anything wrong, and did many things right. It does sound like either one of the known viruses that simply didn't show on the testing (false negatives for nido even on symptomatic animals are quite common), or possibly one we don't yet know about. I'm really sorry this happened.
Just my two cents: I don't think "bioactive" enclosures are the right idea for BPs (I have over a dozen "bioactive" enclosures at home, but only for species that actually need them). I also think expos have a lot of shortcomings as a good source for a first snake (and I do sell at expos, so I'm not biased). Just food for thought going forward.
"I have a question that is hard to ask but I need to know. Is there anything I can do to make my house safe for any snake after this ? Do I need to toss all the stuff? Tanks and everything or can the f10 clean non porous stuff and toss anything like cork and wood? "
I know a lot of people don't reuse porous materials after a situation like this, and that's most prudent. I will point out that all the interesting snake viruses are very susceptable to heat (15min at 65C inactivates enveloped viruses, which nidovirus, arenavirus, paramyxovirus and Sunshine virus are), and this might be recommended as a reliable disinfection technique for porous materials (via boiling or baking). Of course as noted, discarding those materials (double bagged) is the most reliable option.
On nonporous surfaces, a solution of 1 part Chlorox regular disinfecting bleach and 19 parts water will inactivate those pathogens at a 10 minute contact time. A solution of 70% ethanol will do the same with that same 10 min contact time.