Hi @Rax Gupta,
I'm not a CPA so you should definitely check with your CPA about the tax details. Also find a RE lawyer to learn about trust / LLC to decide if it's necessary for your situation.
2) I am in California, if I am getting $300 cashflow, what are the TAX implications ?
if you get $300 after all expenses and depreciation, then you will need to pay federal and CA state income tax for that $300.
Expenses like property management fee, insurance, Memphis and Shelby county local property taxes, etc.
You also need to
3) I do understand that there is a possibility of having a bad renter but what the probability of getting them more often?
That depends on your property manager and how they screen tenants. I haven't had that bad of a luck yet (fingers crossed) but even with good screening I had late payments and eviction filings.
5) I also heard that If I do such kind of investments, then I should create a trust and put my investment property under it. I am not sure how its is going to help me and do I really need it ?
I don't know anything about trust but there is a lot of discussion on BP regarding LLC. IMHO, it depends on how rich you are and how much it's worth to you to be anonymous in the world of Internet and frivolous lawsuit. There are costs associated with LLC - CA franchise tax board annual $800 fee, tax filing, not sure about TN tax filing, etc.
It looks like you need to learn a few things before buying any RE. Suggest you to search through BP newbie area and see what you can learn from there 1st. If you have too much money burning a hole in your pocket, then be careful online because there is plenty of people who won't mind taking your money from you.
https://www.biggerpockets.com/real-estate-investing
Good luck figuring it out.
Henry