Most shuls have a large room that can be used for a wedding. The only requirement is that the room doesn’t have fixed chairs (i.e. pews), since one needs to have space to dance.(though music and dancing at a wedding while customary is not a requirement for a wedding). One should note that many rabbanim have strongly suggested a one man band at most. Actually, recorded music is cheaper.
One should note there is no halachic requirement of a video or even a professional photographer – in fact, until less than a century ago no frum wedding ever had photography.
The only requirements that can NOT be skipped are a kesubah (available at bookstores), a hupah and poles, kiddushin (a ring in most current traditions, some use a coin – and the ring can’t be too expensive since it isn’t supposed to include fancy jewels), and kosher witnesses as well as a minyan.
The government marriage license is an added expense, but skipping it causes paperwork issues and may be illegal (though the person presiding over the wedding is acting illegally, not the couple), though it doesn’t affect whether the wedding is valid under American law.