Taking title and refi brother's property to gain 200K equity

[Jake L.]

My brother has bad credit and currently has a mortgage with an interest only variable loan on his primary residence. He asked if I could add my name to refinance the property to get a better rate (30 year fixed). Luckily, the property has increased twice in value. In exchange, he is willing to give me 200K in equity and promises to continue to pay PITI. All of this would be in writing of course.

1) Would you agree to this?

2) By adding my name to title and refinancing, would this trigger any tax implications? Increase in Property taxes? (property is in CA)

3) Is there anything else you would be concerned about by doing this? 

4) If I were to seek professional advice, would it be better to go to a RE attorney or CPA?