Everest trekking
If you want to trek to Everest base camp then you will come across lukla sooner or later. It is the last airstrip before base camp (still another week and half away by foot) and is handy if you don't fancy the walk in or walk out from Jiri... which takes a week but helps you acclimatize. Lukla isn't the nicest of towns but supplies can be bought here for your trek and it's cheaper than the villages on route. Accomodation is cheap on the trek as long as you eat a meal in your lodge. If you don't have time for a trek (or the fitness) then walk for a day to Namache Bazaar, the last big town. It's a lovely place with plenty of walking potential short or long and is right in the heart of snow covered peaks. Laden Yaks and Trekkers from all over the world make this a really great town. The trek to the base camp has the most beautiful scenery ive ever seen and should really be in the top 10 of things to do before you die. Trek up Kala patar mountain and get a fantastic view of Everest, It's more than 3 miles above sea level!! Goyko Ri is also a trek worth doing and is so peaceful. You can get a magnificant view of the Himalayas and feel like you are on the top of the world
I had the most amazing shower of my life with a view of Ama Dablam (a fantastic looking mountain on route). The shower shed was freezing, the water was too hot to stand under and it was snowing, but it was beautiful and very relaxing!
Accommodations:
The further you get up the trek, the poorer the accomodation gets... but to be honest you just need a place to sleep by that point and don't really care. You may have to squeeze in with people, but the warmth is a good thing.