It will certainly depart an 11000 foot sea level runway at 40 deg C with a reasonable load, and should be able to land on 5000 feet - if that is what you are asking.
Its landing performance is way better than its take-off performance. But at 40 deg C it won't have ANY return payload out of a 5000 feet long runway (in fact may not even be able to take off at all if there are obstacles!), or at 5000 feet elevation, unless the runway is a million miles long.
You also need to look at whether 40 deg C is exceeding ISA +35 at the field elevation. At 5000 feet elevation 40 degrees hits that limit.
Line maintenance dunno, but figure about $10,000 an hour all-up for a typical low utilisation program. That should cover everything including lease and crewing. Given good maintenance and proper crew training, it is not a bad aircraft, but by today's standards it is very fuel inefficient. Providing the runways will take it, a 737 classic can be operated for the same dollars and give you near double the payload.