8K pesos a month for 2 days of work sounds like a lot to me.
I pay the lady which does everything you listed and more (since I have 2 kids), 500 pesos per day (3000 pesos a week), and every single Dominican told me that I am overpaying her (but I think it is fair since I am there for short amount of times).
In fact, I was once told by a Dominican that they will never hire someone who has worked for foreigners for these reasons: overpaid and even lazy.
My cleaner may be overpaid but she certainly is not lazy. I did get the price of 700 pesos a day from a group of Dominicans.. not foreigners.. not maids, but middle class Dominicans. And that was six years ago and I had a smaller apartment.
And I know that it is true that Dominicans will not hire a maid who has worked for a gringa. My last maid turned down a job for a Dominican who was offering twice as much as I paid her.. because, she said, she would be treated badly.
I do not know what that means exactly. I could not find MORE work for her to do than she finds for herself.
My cleaner never takes a break. Never sits down. Always finds something to do.
I know the cost of living here and how it has gone up.
You pay 500 with a concho ride of 50 pesos up in LT. I pay 1000 with transport of 160. So you pay $10 a day and I pay $20. Or say for an 8 hour a day.. $1.25 an hour vs $2.50.
Yours is clearly not in high demand since she is available for part time work when you come home. Mine has work for all the other days of the week. She makes 15,000 a month for the other three days that she works.
Perhaps that is too much. Perhaps she is just in high demand because she is very good.
Personally, I feel bad that I cannot pay her more.
Watching her mop is like watching a fine ballet performance.
Watching me mop is like watching a Marx brothers cartoon.