Are there any unconventional ways to get a mortgage?

I would like to purchase a single family home that also has a trailer on the property with tenants. My bank said they don’t finance trailers/mobile homes and another said the trailer on the property will not be able to be added to the appraisal.

Are there any other ways I could try to get a mortgage? I was thinking a private lender? How do those work? Wouldn’t want to do hard money.

Thanks