Can you change the 240 circuit breaker out for two 120 then use the existing line? Maybe put two regular outlets in?
Not sure if that would be code, but just a thought.
I believe I could not use the current line. Would have to run new coax. If I did that, I might as well run the line from scratch. I do t want to do that. But if there is contention between HT and dehumidifiers, I’ll have to do it.