i have quite a bit of experience on this subject with my raptor. A-arms and an axle is the best way to widen an atv. period. flipping the front wheels will give you more width but at a cost, bumpsteer. bumpsteer sucks and since you are looking for width for turns i can only assume you are wanting to rail turns. added bumpsteer in turns is something you dont want, especailly at high speeds. spacers are probably the best option on a budget, but agian they add bumpsteer, just like an offset wheel spacing. i would advise you to get a set off wheel spacers with a lifetime warranty and are safe to be jumped with. ive seen 2 sets of spacers crack whilst trail riding. they are not safe, i dont care what anyone says. not sure if you are trail riding or racing tt but a lowering kit will help with the top heaviness. again dont cheap out, get one with a lifetime warranty and i would advise NO JUMPING with a lowering kit. DO NOT BUY EXTENDING STUDS. think of all the leverage that is being created by them. i firmly believe they are the worst invention pertaining to atv's and they should be pulled off the market asap. in regards to how wide the rear should be vs how wide the front should be, ive found that the front end being 1/2"-1" wider than the rear is optimal for handing. so if your back is 49.5" wide your front should be 50-50.5" wide. if the front is 2" wider than the rear it makes for very "twitchy" handling that is unpredictable in the turns.
so to sum up my rambling, buy a-arms and an axle to correctly add width. spacers are the next best choice. whatever you do, do not buy extended studs if you cherish life. make the front end an inch wider than the rear.