I agree any space is sellable lots of people raise kids in apartments ... do you have access to outside space like a close by park cause that is often the concern with apartments - no fenced yard but if you have a close by park and access as the PP said to an indoor space for rainy days you could sell that as your plan to address those areas of childhood programs?

My home has the same square footage as my last apartment before I got married ... so only difference is it is spread over three floors verses one ...having no stairs could be a huge plus