Whatever you do,
don't rush into this under any circumstances! This is the best advice that I can give you at this point. That being said, lets see what I can come up with quick like...
Since your initial question was about using a "less expensive" approach to gain around 5" total, I'm assuming you're working with a restricted budget. That's fine, who isn't!? This is when the do it yourself (DIY) approach really can gain you a lot more than you thought otherwise possible. And it's really not that difficult. Even for a novice/backyard mechanic.
You just need some pointing in the 'other' direction...
Check this link, read it over and over, and see what you think.
http://www.lunghd.com/Tech_Articles/...udget_Lift.htm
And once you get to a certain amount of lift, you'll need to address your rear driveshaft angle and length. Here you go...
http://www.lunghd.com/Tech_Articles/...liminators.htm
Good luck!