To be honest as a 3.0 man finding a good home in 7.0 mixed can be challenging unless you are an underrated 3.0. Many teams will take you because there is a shortage of 3.0 men for 7.0 mixed, but you wont play much unless the team is really poor or you are in reality a 3.5 in 3.0 clothing.
Mostly because 4.0 women will most likely have may other playing options and wont choose 7.0 unless they are happy with their partner. And good teams wont play folks that they expect to lose.
"You should be playing linebacker, not singles."