Before planning to come to the Kingdom, you must be absolutely clear about your needs. Saudi Arabia does not impose any kind of taxes and 100% of your savings can be renumerated back home. However, if you think life is easy here, then you are totally mistaken.
First of all, you need to make up your mind on what you need. Are you looking only for savings or are you looking for a good lifestyle? It if is the latter, then unfortunately, the place doesn't offer much as compared to other Middle East locations like Dubai or Qatar. Remember that this is a completely restricted society - no alcohol, no cinemas, no community events, etc. :-S So, if you are the kind of person who wants to "enjoy" life totally, then this place is not for you. However, all said and done, Saudi Arabia is the only place in the whole of Middle East where you can have maximum savings, simply because there just aren't enough outlets for you to spend! :D
Working in Saudi Arabia could be quite taxing and the maximum day temperature during summer touches 52 degrees Centigrade in most parts of the kingdom. Summer in Saudi Arabia starts by mid-April and may go on till almost end of October. Worse than the heat, is the humidity which is intolerable, particularly during July and August. Sandstorms are quite common as also hailstorms and one must be prepared for this. However, all indoor locations are usually air conditioned. If your workplace is going to be outdoor most of the time, then be prepared for such weather conditions. But don't get discouraged, people do work here and the happiest day is when you stand in the queue of Western Union to send money back home ;)