Driving is fine, both places have FREE parking. I always drive when I go to Vegas, it's better than cab fare, etc. You may want to consider staying at the Orleans, it's a very nice place. Not quite as nice as MGM, but very nice, and it would be more convenient for you.
The total cost for painting an interior will run about $1.02 per square foot (about $390 for the for a 12x12 room) of wall space being painted.
All things considered the average cost of interior painting is about $16-$18 per square metre, including the ceiling, which is usually calculated at a higher rate per square metre. For an easy job using a single colour with minimal trim wor k, your quote may be as little as $12 per square metre.