The Housing Choice Voucher List is closed in Myrtle Beach as you know, there is no foreseeable opening. The need far outweighs the resourses.
You might consider contacting the Horry Co. Disability and Special Needs Program given your disabled status.
https://hcdsn.org/home/residential-support/
They offer different levels of residential support that might be conducive to your needs. If not, they might be able to direct you to more appropriate resources.