To those who say get treatment abroad, I don't know op but this is what I guess has happened and a very brief synopsis of what treatment they may need
Both back and front teeth top and lower have worn down over the years
As they have worn two things have happened
1 the bone in both jaws has grown to push the teeth together so they still contact but there is no "room" to build them back up
2 the bite has changed so much the jaw joint is no longer moving into the "right" position which may be making the bruxing worse.
3 there is little tooth left to work with
To correct this several things have to happen
a the "correct position for jaw has to be determined. This may mean wearing a jig for a few weeks.
b the correct shape , size and position for the front teeth must be determined , jaw movements recorded mock up models produced, temporary crowns produced and adjusted . Then fitted and worn for weeks , possibly longer , adjusted until bite right , jaw is in correct position , bone has adjusted and crowns possibly remade until everyone is happy . Also time is necessary for speech to adjust to new position of teeth and again adjustments may need to be made.
c the permanent front crowns are fitted, adjusted and left for a few weeks/months to make sure bite is right. A bite guard is worn to protect them . In this time bone and jaw continues to adjust and space is made for back teeth to be built up.
d back crowns are waxed up , temporaries made and fitted and given time for bite , jaw and bone to adjust . If all well then permanent crowns are made. A new guard will be made
e after a few weeks review and adjust bite as necessary .
all of this is presuming no extra appointments needed to recement temporaries, adjust or carry out root treatment on any teeth which adds a layer of complexity.
f maintain , replace and repair as necessary.
There are some excellent dentists in eg Turkey . They charge around the same as U.K. and would never advise undergoing complex treatment like this , that will take up to a year or more and many appointments , at a distance.