Fisheries -- cool! When I was in middle school I had considered working for the WI DNR.
Anyway, it is an excellent networking opportunity! We have good working relationships with the regular custodial staff.
I actually used to work with a CNA in subacute, and later crossed paths with her as a custodian at the hospital I now work for. I believe she had worked both jobs at one point. Working with her as a CNA, I always felt like my day would go better.
I actually told her to use me as a reference if she decided to apply for a CNA position in the hospital.
You would be demonstrating your work ethic by taking a "dirty" job -- and in your case prioritizing your nursing education by taking a job that offers more flexibility than your longtime fishery work.
No decent human being looks down on someone who not only does honest work, but VERY IMPORTANT work. Actually one of Florence Nightengale's big innovations: sanitation in hospitals. Actually it's believed that 2/3 of Civil War casualties were due to DISEASE, not the battlefield injuries themselves.
I also remember back in hospital orientation, our CEO recounted asking hospital employees how they supported our mission statement. A custodian said he contributed to pt/family centered care by making the patient's environment safer, more relaxing (*I* for one would go batty if I had to stare at an overflowing bin with diarrhea-soaked bedding!), and by helping them to feel cared for.