Tenant with special needs son

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Bought a 4 plex in south Dakota, inherited a tenant who has a special needs son. His teenage son has muscle control issues along with diaper issues. He is a good tenant but taking care of boy is hard as he is a disabled veteran. I give you this background as my question is. Does anybody know who to contact to get handicap bars in the bathroom and braces for toilet as when he does try and get him to toilet, w/o braces he breaks the wax seal? Id like to put in linoleum flooring to, too  help with oder problem. But was curious as to wether any agencies might offer assistance, or will this be all at my cost?