Ruby,
Regarding the PEG surgery after the start of treatment. If you decide to do that, opt for the surgery on a Friday so that you have the weekend to recover. You will be sore for a couple of days and won't feel like moving around a lot. Also, make sure that, if possible, you have a home health aide/nurse show you how to use the PEG and what supplies are needed. Do you have insurance?? If so, it should (as Christine said) pay for the feeding supplement and supplies...a lot of companies are out there that will supply all of this, bill your insurance, and deliver it to your home.
Good luck with all of this...I know it feels like a mountain to climb. Once you start treatment, a lot of the stress will end and you will have to put your resources toward eating, drinking and healing.
Hugs, Deb