I've been doing a lot of research over the last couple of weeks on what would be the best bang for the buck suspension mods I could do for my '06 Tribute, & this is what I've come up with.
1. 2" strut spacer lift $47: https://www.ebay.com/itm/SR-Heavy-Duty-Front-2-Leveling-Lift-Kit-FOR-Ford-Escape-Mariner-01-12-4x2-4x4/303367599717?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
These things have already been discussed to death, and the pros/cons thoroughly weighed. They are still, by far, the best way to lift the front of your 01-12 E/M/T; especially if you are on a budget..
2. This is a new one. You can install 1" (or larger) coil spring spacers designed for an '05-13 Nissan Pathfinder, or '04-13 Armada. They are around $57: https://www.ebay.com/itm/SR-Heavy-Duty-Front-2-Leveling-Lift-Kit-FOR-Ford-Escape-Mariner-01-12-4x2-4x4/303367599717?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
I discovered this by looking up coil spring sizes on O'Reilly's website. What I found was actually pretty surprising! If you would rather do a spring lift than use poly, or aluminum spacers then you could use '05-13 Pathfinder V6 rear coil springs instead of buying expensive lift springs ($86-$120 pr.) They are the same ID as stock (4 13/16), and are only 1/8" wider than the stock coils (6 1/4 vs 6 1/8)! You would have to remove a coil or 2 because they are a lot taller than the stock springs, but since they are constant rate that isn't really a big deal.
3. Don't forget the shocks! Most of you know that you can adapt a set of Rancho RS9000 shocks to work on the back of an '01-12 E/M/T, but they are a little on the expensive side ($200+ pr!), & don't give you any additional travel over stock. I found a set of Rubicon Express shocks that range in price from $27-$44 ea that will give you 11" of suspension travel in the rear (stock is 10.25")! They are $27 ea here: https://www.amazon.com/gp/product/B00E5V2GTI/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&psc=1 These are designed as front shocks for a lifted Jeep YJ, or XJ.
You may need to move the ABS wire, and brake lines around a little to make sure that they aren't being strained at full droop. These shocks are 15.7" long compressed (stock is 15.25"), and 26.5" long extended (stock is 25.125"). That's around 1.4" more droop to keep your tires planted on the ground when traversing uneven terrain! These should pair well with those rear coil spring spacers.