Ultraman

I'd experienced painting about 1000 sq ft, all the interior of a unit, it's much more work and much harder than expected! (providing that I'm not a pro., but not the very first time already)
If you're going to do it yourself, remember some issues:
* some basic painting skills (in terms of buying needed tools and materials and the use of them etc.)
* have sufficient time to finish the whole job before moving in (eg. how many days off needed)
* in case you find out that you can't get it done by yourself when the moving date comes closer, any back up plan?

Doing the floor (likely laminated floor) is more complicated than painting. Considerations are:
* do you need to take out the old carpets/old floor (if applicable) before putting new laminated floor?
* need to buy the needed tools and materials; and skills to do the work
* accurate measurement and cutting/trimming
* should from where to start in every room
* handling of possible trouble shootings: in case the floor is not lying flat as it should be, the seams don't merge well...
* also, got enough time?

Usually, do the painting first and then flooring.