Hi there,
I'm from Myanmar and firstly, you have to ask your company that if they can find you an accommodation (I don't mean hotels coz they are really expensive and you mentioned that you'll bring your family). You know what I mean.
And where will you work (City) ? But I know that salary for foreigners are really high in Myanmar. So, if you come by yourself, you gonna be fine.
Anyway, Myanmar is not a bad place for foreigners and now many foreigners are coming here to work (employed by the foreign companies).
Wish you the best,