Even hard when there is a romantic layer added. 

A family necessity, a job transfer, a romantic involvement, or just having an enlightenment and wanted to walk the earth?

I would reject because one has no income, but you can't do that in California if the other has enough to cover the rent.Students don't have jobs, but they have income from somewhere, otherwise, they couldn't be going to school.See about a parent co-signer for the student.First time living together in a romantic relationship is pretty iffy.

I think he has a romantic idea about building super efficient units to cut down on utilities.  

They don't want the romantic notion of high returns in quick time with minimal effort to not be true.  

I became aware that she has some pretty romantic ideas about our joint venture and seems to be somewhat more emotionally invested. 

Being able to dim the dining-room overhead makes for a much more romantic setting, don't you think? 

However, your partner in business does not have to be your romantic partner.

We stay away because we would rather bring what we like to eat everywhere we go in thermos bottles and it is like being on a romantic picnic every day vs. sitting and waiting in noisy restaurants.  

@Benjamin Greene Just like in a romantic relationship, if someone does not put you as their priority then you find someone who will.