Don't have high hopes to have a person that can cook and clean, usually they clean, don't cook, to have a cook you have to have her doing shopping for ingredients and supply and handle your monies and there's lies the problems of honesty not to mention her knowledge in what and how to cook to suit you, as for salary, a cleaner who clean the house 3-4 times a week for 4 hours a day, do the washing and ironing should cost no more than 5,000 baht a month, but if you can find the rare person who will clean, cook and be honest and diligent and trustworthy you're one lucky guy..