Mostly it will be a matter of is the time + local printing cost for large format printing worth the hassle of just buying.
Your cheapest option will probably be blank game boards and print out stuff to put on that or printing on good cardstock at the local print shop.
Also I have played on vinyl play areas (basically banner sign material) for minis games that were professionally printed but those sell for what you are gonna pay yourself not counting the time and effort for designing the play area though if you want a blank for marking up with dry erase that may be cheap enough.
And there is this guys idea.
