DBA to rent out spare room

[Mehran K.]

Hi all, my tax question isn't as complex as many I've been reading here. Just looking for some advice.

I'm about to close escrow on my first home (primary residence) soon! I plan on renting out one of the rooms to a tenant, and using the other spare room as a home office for that business.

After some research I've decided to just do this as a Sole Proprieter (DBA) so things can seem more professional. Seemed like an LLC would be nice to protect my personal assets, but for my situation I think it would just cost too much. What do you think? I plan on getting a separate business account for all my transactions that involve the business.

Questions:
1. For this situation is there any benefit to getting a separate Tax ID for my business? If so please explain?
2. Can I establish business credit on a DBA with a separate tax ID? or is that just for LLC's and above?

Any advice/pointers would be appreciated also! Thanks so much in advance.

Mehran