If you are gonna axle swap might as well go with a 8.8 31-spline with disks. In my world, if I have the truck up and out of commission I am going to do as much to it as possible in that time. For example, in January I am putting front lift on, while I have the weekend off ant the truck is parked I am going to do an Expo rear disk swap. The only advantage to the 8.8 28-spline from a Ranger is you won't have to get the spring perches swapped.
As for price. You can get the axle on the cheap. Like $100 from an old Expo. Then you will need to get the brakes all redone. New pads, rotors, cables, springs. Then you need to paint it up. Then you need u-bolts and backing plates. Then you need new spring perches and have them welded on if you can't. Then you need D35 IFS gears, and 8.8 gears. I would go with 4.88s if you plan on eventually running 35s within the year. Your gas mileage is gonna suck till then though. To have the front and rear diff regeared it will run around $800-$1500. Assuming that you don't have the tools and knowledge to do it yourself. It is not exactly something a backyard mechanic can do.
At the end of the day it will run around $1500 total. And no, you cannot have different gears in the front and back. They have to match.
2010 Toyota Tacoma Access Cab 4x4 Auto V6
2000 Ford Ranger 2WD 2.5L & 1976 Ford F150 Supercab 2WD 302