Start from Lukla. Halt at Pangboche and change next day halt at Dengboche, this will help acclimatize. Keep 1 day in hand for Gorak shep as weather may not favor sometimes for clear view of the Everest.
On the way back, come down to Salleri or Jiri, preferably “Jiri” as public transportation from Salleri to Kathmandu is very bad. Make the trek short after Lukla on the way to Salleri/ Jiri as knee ligaments may get injured by then.
Give good tips to the portar at the end of the journey as they hardly save any money from their wage because of having to pay for their food on the way which is comparatively expensive for their income.