Hey there, Roach. No worries, take care of your family, and I understand the job unpredictability more than you know.
Unfortunately I had the same Soft-Lock happen earlier this morning. I had left my computer on after playing last night into the early morning, after I woke up I tried to open SPT and again my Hideout refused to load.
One thing I can say is I was level 16 and for whatever reason the Flea Market is available to me as soon as I start my new profile at level 1? Not sure if the Server Logic could be conflicting with my Profile after hitting level 15 and realizing I should not have had access to the Flea already? I use the Flea to upgrade my Hideout as it is an easy way of getting the Items necessary. I have it set to unlock like normal (At level 15) in SVM.
I am Planning on running a fresh install and again trying to remove some of the "Bloat" and mods that do similar things.
I have tried removing any setting that affect the Hideout, Like completely disabling the "Hideout" tab in SVM. My next step is trying without MultiplyALL, as that mod affects Hideout production time also.
Also I can get into my Hideout as soon as I start a new profile, the issue is after X amount of time I will try to access my Hideout and I get stuck in an Infinite black Loading screen and I can never gain access back to the Hideout once this happens.
I will try removing the suggested mods and give any updates. I appreciate you taking time out of your day and working with me on this issue, Roach.