Easy to figure.
1. Get a chart or for basic planning you can even use a map or an atlas.
2. Measure the distance from where you are to where you want to go.
3. Figure the speed of your vessel. Divide the total distance by your speed in miles per hour or knots.
4. You now have the total number of hours, under ideal conditions, required to reach your destination
5. Since you have 10 days to make the trip that is a max of 240 hours total sailing time available. If the answer from #4 is more than 240 then you need more time. If you will only travel days then you have +/- 120 hours. If answer from #4 is more than 120 they you need more time.
Only you know if you have the desire and skills to sail directly offshore
or travel the ICW
or travel day and night or only travel days and anchor
If you can't do the calculations you should consider hiring a professional captain
to accompany you on the trip.