If you are so concerned about doing your own washing by hand I think the best solution would be to ask around and pay someone to do your washing for you. It is cheaper than buying a machine and it gives some nice baba extra cash. I am sure if you pay well you will have no trouble finding someone willing to do your washing. Also better for the environment and provides economic benefits to someone.
It's not the washing I'm concerned about, it's the drying. It seems though that dryers only come in combination with a washer, so if I were to buy one I'd have to get both. Though having a washer wouldn't be too bad either. I think in the long run a washer/dryer would pay for itself and be more convenient then asking someone to wash your clothes for you.