I have always found working independent on a very part time basis hit and miss i feel like i need to be available a lot to get some bookings as choosing 2 days only could be dead days but what your need to deal to make it work is advertise else where like viva or friday ad that will get phone ringing more but you do have the expense for 2 days it might or might not pay up. Some women have got extra work from agencies if only availble a small amount to top it up but then dp you want to work for an agency also. I had WG friends that quit working indie when only available 1 or 2 days a week as they found they needed to arrange and take calls emails bookings on other days when they did not want to or could not so they went to agency 1 or 2 days a week because they only could work those set hours and other days phone off and no interaction with it. You could see how you go with more adverts though and go from there but being honest i have not found being indie beneficial very part time unless you have regulars built up then it can work.