Thrifty Thursday: Can you grow a family tree for free?

I used to spend most of my disposable income on clothes and cosmetics. Clearly I have hit middle-age - nowadays I plough my spare hard-earned cash into family history or my other passion (or obsession, depending on your point of view!), war memorials/WW1 history.  I would however, still like to look presentable, so I need to find a way of saving money on the family history stuff and diverting it back to the look-good fund.

I have thought about it and put my thoughts on a Hub - here is the link:  Can you grow a family tree for free?  Hope you enjoy it and maybe get some tips.