What do you mean by 'as soon as I can find a donor for the other half of my own ancestry"'?

I've thought it might be fun. Is this three project that finds your earliest maternal ancestor? Something about all people tracing back to 4 women. I'd do this, except from what I recall when investigating this previously, it costs a big pile of money. Plus, if I need another family member to donate anything, I can't do this.