Seeking suggestion for headset and bottom bracket press
I've used the Park Tools BB30 tool thing and a bar clamp (eg this) to squeeze pressfit bbs in. I can't speak for headsets though. 

I've found that local bike clubs are a good way of gaining access to specific tools like this. Especially as they can be expensive considering how many times you might need to use them. And you get the bonus of someone who's experienced fitting things like headsets before. People are usually keen to help a fellow cyclist out.