Hello--
When convincing parents to let you have a snake, a large boa is not the snake of choice--believe me. However, there are many other species (some have been suggested in other posts) which are smaller, yet just as interesting.
Do your homework, formulate a plan, and put it in writing.
Considerations to be researched:
1. Who will pay for the snake?
2. What equipment will you need?--ie. cage (what type?), heat source (what type?), water bowl, thermometer(s), hide boxes & other cage furniture. Also consider if the snake will need a larger enclosure as it grows.
3. Substrate: what type will you use? Newspaper is cheap, but if you opt for aspen shavings or carefresh, who will pay for this expense? Who will clean the cage and feed the snake?
4. Food: How much will it cost to feed your snake per week? Who will pay for the food? Can the food items be easily acquired, or will this mean that your dad or a family member will have to take you to get them?
5. If your snake becomes ill, is there a reputable reptile vet in your area? Who will pay for the vet bill?--My experience is that a typical exotics visit can run $50-$100 depending upon what is wrong, tests that need to be done, medication, etc..
6. Where will the snake live at your house? In your bedroom, the family room? Are there family members who are very fearful of snakes?
7. How many other pets do you have? Do you take good care of them?--This can be a big plus; proven experience that you are responsible for the needs of another living creature.
If you think it through and formulate a plan to present to your dad, he may decide that you understand the requirements of caring for this animal. Read, read, read, so that you can supply information when your dad asks questions. Best of luck to you!
regards,
althea