QPR have increased their January spending by signing defender Fitz Hall from Wigan for an undisclosed fee.
Hall and Vine are set to link-up at Loftus Road
Hall, 27, has signed a four-and-a-half year deal with the Championship club.
Rangers are also close to sealing the permanent capture of Birmingham striker Rowan Vine, 25, after he impressed during his three-month loan spell.
Ex-Aston Villa keeper Stefan Postma, now with Dutch club ADO Den Haag, and Argentine winger Sebastian Rusculleda are also in line to join the R's.
Rusculleda, 22, plays for Argentine outfit Tigre and will arrive in London to complete his move next week.
QPR have money to spend in the transfer market after a takeover by Formula One magnates Bernie Ecclestone and Flavio Briatore, which has been followed by investment from steel tycoon Lakshmi Mittal.
They have already signed Akos Buzsaky from Plymouth, Hogan Ephraim from West Ham, Matt Connolly from Arsenal, Gavin Mahon from Watford and Patrick Agyemang from Preston.
Rangers have enquired about a number of other players, including Tottenham winger Wayne Routledge.
A bid to re-sign former Rangers defender Dan Shittu from Watford has also been discussed and Birmingham centre-back Martin Taylor remains a target despite competition for his signature from Norwich City.