Naran hotels can be booked cheap these days. If you negotiate, you can even get 1000-1200 for less expensive but decent room.
No problem for Mehran. One side is around 2-2.5 hrs with a few bad patches. It rained here so road is a bit slippery.
Petrol is rs. 68 at pso pump but those old pumps do not look accurate. Open petrol is rs. 80