My dad is in the Oregon VA home and the cost is $6000.00 a month. My mom has spent every bit of there retirement on the cost and is about to sell their home to pay for the monthly expense.
Honourable discharge seems to be the criterion, rather than theatre of service per se. Go to https://www.oregon.gov/odva/Benefits/Pages/Long-Term-Care.aspx and look on the site for contact details - it would be best to get advice to navigate the system.
Has your mother been reluctant to ask for help?