Sorry for a late reply.
First idea that comes to mind – will standard WooCommerce “grouped” products solve your task?
Also we’ve just released new plugin version 2.9.3. Not sure if this will be good enough, but I’ve added
product_ids attribute to the
[crowdfunding_totals] shortcode, so you could display total sum from multiple products like this:
[crowdfunding_totals return_value="orders_sum" product_ids="1668,1669,1670,1655"]
Hope that helps. Please let me know if you have any questions.