Family tree wall

I have a wall in my house that has a big picture of the Colosseum on it, and while in some way it describes part of my children's heritage (mine), I really want to make that wall our family  Heritage wall, more specifically our Family tree wall.
While I wait for my husband and I to find the time to paint that wall, which will be when we will be painting the whole living room and kitchen, I have been scattering my brain.
First of all, this time I will not have a single tree with my kids as the root persons. I have that nicely framed on another wall in the house, but there is a problem: I made it when I only had 3 kids. Now I have 4, and who knows if the Lord will bless us with more.
I have come to realize that those kind of family tree displays are for families that are done having kids, or that don't mind creating a new display each time a new child enters their lives.

So, what to do, what to do...
My solution is to have a family tree for each of the parents and then have a picture for each of the kids hung under the 2 family trees. This way when a new child comes, a new picture can be added, and when the kids grow up, if wanted, their picture  can be substituted with their grown up ones.
When they get married and have kids, I can either add more pictures, or substitute with  their family picture. (Yeah, I am thinking waaayy ahead!^_^)
As a final touch, the family name can be added.
I am scattering my brain for different ways to assemble the whole project.
Here are the ideas I have been working on:
 
2  20x24 canvases, one for the family tree with me as the root person, one for the one with my husband as the other root person.
a 8x8 canvas with a picture for each of my kids(4) and a 20x8 canvas with our family name (optional).

Cost    as low as  $343  (with a Gold HM Club membership) plus shipping, might save 10% more if I publish when canvas publishing goes on sale in December
Should I want these framed the cost would go up
2 20x20  canvases,4 8x8 canvases and a  20x8 canvas with our family name (optional).

Cost:   as low as  $330   (with a Gold HM Club membership) plus shipping, might save 10% more if I publish when canvas publishing goes on sale in December
A smaller and much less expensive way would be:
2 11x14 posters , 4 8x8 pages, and enough 5x5 greeting cards or 5x7 invitations or 3x3 family folds to fill  with the letters of our family name.

Cost: as low as  $20 (with a Gold HM Club membership) plus shipping.
I could also use the 4x8 photo card for the letters of the last name,, making it even less expensive. 
These can be framed, or modge podged on tiles or wood to give them dimension.

Cost will depend on the sales I can find on frames and/ or coupons I can use.

It would almost be cute if I painted a tree or found something to stencil on the wall, like this:

Once we will finally have this in my house, I think my kids will love it too, because there will be big pictures of them (you know how when they are little it is all about them ) but then there is this big canvas with this family tree, and they will have more opportunities to hear about their ancestors since they will be constantly "looking" at them!
Now, which color should my wall be?

 

Decisions decisions...

Do you have a Heritage wall in your home?

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