buying a co-op for my mom

I posted this is the sales section but realize now it should be in the finance category. We are contemplating buying a co-op for my mom in brooklyn a few blocks away from our house. Our understanding is the the co-op board in this building will not have an issue with us owning and it being occupied by my mom. The issue is the bank. We will be putting a substantial amount down but also taking out a mortgage. The mortgage broker is telling me that we would be seen as investors and very few if any loans available for investors for co-ops and that the terms are terrible. Any ideas? She does not have the income to support the mortgage so not sure it would work to put it in her name. Thank in advance for your help.