I need to leave my house for 30 minutes

I need to leave the house 2x a day for 30 minutes and my 4 month old is just not having it. She hates the crate during the day. She will eat and nap in the crate for no more than a hour at a time. She does sleep 7 hours at night in the crate perfectly fine. I tried a playpen as well and out has the same effect. We have used calming chews inside a long type ball. Put all her favorite toys. Gone on long walks beforehand and after hand. I tried small increments of time but I also take care if my elderly mom so I have to be realistic. I need to leave at some point. Having someone at home all the time is impossible. My other dog loves her crate so I am at a loss why this one just hates being left. Please all help is appreciated. I am going nuts.