This concept has an interesting start and basis for strategy. I think the current "swap" feels much more like dragging pieces to their intended position though and lacks that satisfaction of a 1 to 1 swap.
Math may not be everybody's cup of tea but this is a satisfying way to make number go higher. I like how the gameplay is reminiscent of Loop Hero's tile placing system. However I struggled to wrap my head around HOW the math was working and if I couldn't make sense of the numbers I resorted to swapping good buildings near each other until the solution worked. I couldn't intuit a way to trouble shoot my tile placement even with the help of the values listed so maybe this is my fault as a player.
There is a lot to build on with a gameplay loop like this and easily the type of game I would buy on Catalog.