I have been looking into tax deed real estate particularly in California; I live in Los Angeles.What has been people's experience with dealing with the dwellers/owners/renters of these tax deed properties?

Don't worry about what people say, but with the numbers you put out, they would be right.

There's a lot of people that say you can just take over the payment of the seller and have them sign a silent DOT, but without approval/knowledge of the underlying bank. 

I found this step by step process on how to evict a tenant in Fulton county: https://www.fultoncountyga.gov/inside-fulton-county/fulton-c...The link also provides you with some email addresses of people working for the county, specifically on evictions. 

The rest people need to make sure the numbers are good.

Can you start a fund where people provide you capital and in return you guarantee them a yearly APR in return and provide monthly interest payments. 

Unless I’m wrong.I thought maybe to buy apartment in 400K range in Miami in some tower and make airbnb from this, I know there is huge competition but a lot of people always coming there for vacation what is your thoughts ? 

I would list them as Rent to Own (more people understand that language then lease option).

They are terrible people and that is terrible music, but that's not how it works.

I point this out because I know there are people out there who are looking into investing in turnkey but hesitate because they are inexperienced as well.