Not gonna be cheap no matter what axle you use. Toyota w/ spacers or late 70's waggy d44 will both work. Leaf springs will prob be cheaper than a multi-link suspension (and easier).
If you have a manual trans then you will be dealing with a very short front driveshaft (at least my 1st gen was like that). So, if you can afford a high pinion toyota or retube a hi pinion d44 for pass drop, you'll probably have less problems.
If you have an auto you have a little more room to work with.
Either way, the cheapest part is getting the axle. Then you have to regear, rebuild, cut, weld, get nuts and bolts, etc--all the nickle and dime stuff.