Is there a ballpark amount of how much it will cost to trademark a logo? If I hire an attorney, what should they charge me including the filing fees?
Generally I recommend against a logo design for a startup. A word mark is better, and you have to have a word mark (which should match your domain). I have seen many clients register a logo, and eventually change the design, and then have to start the process over again.
A word mark in block letters covers all designs.
If finances are not an issue, the register both the word mark and the logo.See question