James you are really pushing the bottom end of the scale here below feral camp level.
Have you ever been to Indonesia before?
To do this you will need to catch the ferry there and even at $35 a day, you will have to pay for every aspect of your trip, extras , food , water, boats to breaks, boats to and from the ferry.
The place you might get to stay will be Mentawai poverty level , then you will discover, why Surfaid is so desperately needed in the islands.
At feral level you will be more exposed to malaria, dengue fever, cholera and all the endemic diseases of poverty and poor sanitation and the locals will have no means to support you with any hospital or medical care. ( will you be so cheap as to not take insurance)
BTW playgrounds are islands and not all the breaks are on the same island not like coasts you will be familiar with.
Feral level boats are also not all that reliable, petrol is watered down so some pretty strange things happen at sea and each boat trip will cost rupiah and more than$10.00 equals about 100,000 rupiah
I suggest you think what breaks you would like to surf (they change each day and each swell) and try googling the camps.
Get a general idea of what you you are asking for.
There is also the Mentawai, government fees and Indonesian accommodation taxes all more than $10 if your homestay doesn't pay it and they are caught big problems for them and you.
Think seriously about this as you plan you trip, disease and government hassles do not make it pleasant.

Serious problems will blow your budget , don't risk a mess with authorities.