I'll say go with what you have in your business plan. Be sure to set realistic goals especially in the first year. Sure, you might very well lose money your first year, or breakeven. I think its important not to price yourself out of the market by aiming for the $30k profit. Again if you have a plan that will make you that much profit in 2-3 years, then go for it.

Good luck. Again that business plan should be your guide. Let it work for you.