You will definitely want to pay yourself enough to live on if you are doing this full time for six months! Hypothetically, if you had enough of your own savings to live on in that time, you may be better off from the point of view of having a realistic and credible business plan to invest that money in the business for yourself, then pay it out to yourself as a salary, so it is clear what the work you are doing is costing the business (and, in turn, the investor).
This is a little semantic, but it is worth noting that some business plans will consider the staffing costs in a 'personnel plan', and the purchases of goods and services from external sources in a 'budget'. Both of these are expenses, but some investors and funding bodies will consider them separate categories.
Depending on where you are looking for funding, it might also be useful to justify why you believe you deserve the salary you wish to pay yourself, for example, with a summary of your own costs (a personal survival budget), to put into perspective why you feel the need to pay yourself the amount you do; (when I want through my last round of funding, it was noted by my mentor that my proposed salary was a little higher than many who were competing for the funding, and I was able to quantify that a little by listing my living costs, as someone who lives alone, completing against quite a few founders who were recent graduates living with their parents or similar).
The bottom line is whatever you do, make it clear from the plan!