Poor man's tj lift:
4" lift springs and lift shocks=$400-$500
Aftermarket track bar (fr) =$200
longer rear brake line (YJ)? =$30
Rear track bar bracket =$30
That comes to around $700, the rest of the issues can be tackled without much in parts, relocate front brake hard lines, Drop t-case/skidplate with some longer bolts and spacers, extend swaybar links or buy aftermarket, etc.
This is not the best way to go but is adequate and cheap...It IS BETTER than many lift kits on the market which come with parts that fail, do not fit the jeep, or are worse than stock...of course there are really good lift kits on the market too, for lots of $$.
Lots of kits include control arms which are in many cases inferior to stock.
Lots of kits include front trac bar drop brackets which are unsafe and can fail.
Some kits include front trac bar relocation bracket for the lower end which are pathetic and fail.
Almost no kits include a new front trac bar which every lift of 4" or more should have.
Many kits contain "solutions" which create more problems (think fancy aftermarket longer brake hoses with fancy braided stainless covering that crack and fail in our cold climate...but theylook cool! Ahem RE cough RE)
Good luck jacking your ride.
PS Bnine is right, my jeep is on 35's and 5" lift and some days I wish I had 31's, 2" lift and a tummy tuck...it would be a lot more civilized, handle better, chew through wheel bearings less often, etc.