There are 180 posts pertaining to spray booths in the archives of this area of the forum. Beside the "Search The Forums" box above, click the word "Advanced". On the advanced search form enter the words "spray booth" in the keywords field. In the drop down list for "Choose Forum" select "Painting and Airbrushing". Change the September, 2004" date to something like January, 2004. Click [SEARCH]. You should get about 9 pages of topics, and there are lots of hints on how to build inexpensive spray booths. I saw one that the builder said cost around $40.
Opening a window and putting a fan in it will help some but not a lot. To completely control the vapors you need a self contained enclosure, an exhaust fan, and a duct hose to direct the vapors outside. A fan generally doesn't have enough suction to control them very well, but it will help some.
Failing that, get a respirator. They are about $30 at Lowes or Home Depot, however you need to remove the organic vapor cartridges when you are not using them and keep them in a sealed bag (I use a large ZipLock bag for mine). Put your box close to the window and use the fan to blow as much out as possible. This will help keep fumes from getting in the rest of the house (it will help, NOT eliminate the problem). The respirator will protect you because you are right in the middle of them.