Severe separation anxiety dog + apartment + no support system. At a loss.

I’m a single dog owner raising my 4-year-old dachshund completely on my own. He has severe separation anxiety. When left alone, he barks, howls, and paces nonstop. I live in an apartment and have already received noise complaints, so this is not sustainable as-is.

I have no family or friends nearby who can help with care. No partner, no roommates, no backup. I recently left an abusive home environment and am rebuilding my life independently. I have to go into the office three days a week for full 8-hour days, no exceptions and no WFH flexibility.

I’m also under significant financial strain and cannot afford additional paid care such as sitters, daycare, or boarding. My dog is not comfortable with strangers, which makes outside help especially difficult even if it were financially possible.

I feel incredibly stuck and overwhelmed. I’m trying to do right by my dog, but I don’t know what is realistic anymore under these constraints. Has anyone dealt with severe SA in an apartment while working full-time alone? What actually helped? Training, medication, management strategies, anything?

I’m open to honest advice. Please be kind — I’m doing this entirely by myself and genuinely trying.