[So true. Too much of one and its a sappy romance movie that no one can stand. Too much of the other and its depressing. What a delicate balance writing is ^.^ but yeah they can have light conversations and they can help the other out when they come to a block in their work. 
{If we're gonna have the TARDIS crash, I think in the yard would be best since we don't want to put repairs on a home lols. And that would totally work for their meeting up a lot sooner than Donna and Ten had and a good way to get these two to work together and get out the quirks.