Policy proposal thoughts

Here I'm trying to propose a new defense system in one of our regions. The government doesn't hold enough VBX right now, it's about 28VBX if I remember correctly.
First, there should be an indication, so just by looking at the table, you should know which projects are affordable. I was thinking simple things, like:

• grey out the whole line if the given project lacks anything
• indicate with red color the missing thing (in this case that would be the 50VBX)
• forbid to propose any project that lacks materials
• hovering over any item could show the amount the state has (or indicate them in another intuitive way, ie. 50VBX / 28 VBX, where 50 is the price of the DS, 28 is the amount the treasury has)