Hey, new here, really like the project you made Sanni. Having bought a SFC not too long ago with a few games on ebay, I wanted to read and patch some of my Japanese games.
The github page / wiki has all the links necessary to buy everything you need to build one of these, thanks for that!
My advice, as you mentioned yourself, is to try and keep the PCB to 10x10cm, unless some other PCB fab has a better deal than JLPCB.
Now, I've put the dimensions of your new board (15x10cm) into PCB shopper and JLPCB is still the cheapest at 20$ for 5, https://pcbshopper.com/
I do want to build one, but I'd like to know if and when you're going to update the current design to the new one?
Should I just wait for the new board or go ahead and buy the current version ?