Background info: We're paying for the whole wedding ourselves (100%, minus only my dress). We have a mortgage, one truck payment (I drive an older used car), standard household bills/expenses and I'm still in school. In an effort to save some money, we've pretty much decided that we ask single guests in non-committed relationships not to bring a guest. I've gone solo to weddings and had no issue. We have over 50 single guests coming, so if they all brought dates, 25% of my guest list would be strangers. I don't want to cut people I know and like from my guest list so that people can bring a date just for the sake of it. Having said that, here's my issue...
Today my (very single) cousin was texting me and asking how things are going with the wedding. I told her that I can focus more on it after the holidays because I'm graduating 10 days before Christmas. I also said that my guest list is out of control and I need to make some cut backs. She then said "lol as long as I'm on it with a plus one!" There are two conflicting issues with that. She's coming in from Arizona, so I feel she's entitled to an exception to the singles rule. My hesitation, however, is that the kind of guy she would bring is just not somebody I want at my wedding. In fact, I was very uncomfortable with her "friend" she brought over to my house last time she was here. She met some guy at her hotel and brought him over my house. She dates...well...thugs. There is no other way to put it. They all have problems with the law, babies with other women who hate my cousin and cause problems, etc. The random hotel guy that she "Fell instantly in love with" wound up leaving her because he had a secret girlfriend back home in Illinois. Her most recent serious relationship ended when he went to prison for armed robbery. Get what I'm saying?
She'll be flying in with her parents, her sister and her sister's husband, so I'm not sure if that's enough people (in addition to the rest of the family who live here) to justify telling her not to bring a date. If I wasn't worried about the type of person she'd bring, this wouldn't be an issue, I'd just let her and not say anything. I just don't want to worry about somebody bringing a gun or drugs to my wedding, in addition to whatever else could go wrong in that situation.
Advice?