I had a friend in the same predicament as to whether to put in a bath or not.
From her informal poll, she decided she would be cutting off a lot of potential customers, if there was no bath.
For example in my family, every one of us would want a house with a bath for different reasons:
- brother : to wash kids
- parents : think showers are 'new-fangled' and prefer baths
- sister : prefers bath to relax in / soak feet etc
- me : to soak sports equipment (wet suits etc)
So I'd go for a small bath, or at least plumbing to make it very easy to retro-fit one.