LLC is considered a "disregarded entity" for tax purposes...simply put, it is treated as sole proprietorship and filed on the schedule C of your 1040. Meaning you will in fact have to pay SE tax on any profits of the business. Plus you would have to an income tax...how much income tax? Well depends on how much your other taxable income is and what your avg tax rate is.
Only way out is through an S corporation, but you have to pay yourself a salary anyways, so for $25,000 not really worth doing an S corporation....start profiting $75,000 and you got a different story.
There is also a C Corp...but we wont even go there for this example.