Vote remain from me too.
There is no El Dorado for being outside EU. We are not Canada or Australia, but offshore islands of the European continent. The only international leader supporting Brexit is Putin, not because it's good for UK but will weaken EU.
While UK may flourish outside EU, we won't know for something like 20 years, after a recession or two, massive job losses, high inflation because of plunging pound (by 20-30% possible) and huge damage to our economy (mainly dependent on service industries and financial services).
While benefit tourism must be stopped, immigration itself is good for UK and it's always a two-way process, where British citizens can take up jobs and residence throughout EU, as over a million have already done.
The only political parties in other EU states calling for withdrawal from EU are far right fringe like Le Pen's Front National in France.