As the topic says, what's the cheapest PC I can build that will play Planet Coaster comfortably and uses SSD?
I need it to hold me over while I pay some debts and schtuff.
Going from the recommended specs, this should suffice for <$500
PCPartPicker part list / Price breakdown by merchant
The trouble with planet coaster is that it is very CPU intensive - once you get a lot of items in a park it needs a lot of computing power. You'll be able to buy something that will run the game fine for fairly cheap, but then once you load a detailed park the fps will drop significantly.
See this thread dedicated for people asking similar questions:
I'd suggest a build with a 1050Ti or better (although you may be able to get away with something a little weaker for a GPU if playing on low settings) and a mid range processor, preferably with a few more cores than 4. Once you have a build you could post on that thread and see what people think!