Im looking into seller finance for the future but I dont know yet at all.

If you are just starting out, get your finances in good shape because it's likely going to be death by a thousand cuts getting a property to market. 

You just have to know how to buy and how to position the financing, but yes all of our properties cash flow.

In terms of financing, what you will usually see is a lower LTV and somewhat a higher interest rate.

He sent me the finance option which included my down payment of $2999.53 which I agreed to and then ask when should I cancel my current a time policy.

This includes working with a knowledgeable agent familiar with your investment area, finding trustworthy local contractors for your projects, securing responsive insurance agents, partnering with investor-friendly title companies, and connecting with lenders offering suitable financing for your strategy.With your goals set and team in place, you should feel more confident in your approach.

A little tricky to finance since they are manufactured. 

Scenario 1: I purchase a three-bed, single-story, single-family dwelling for $200,000 to $300,000, have it financed so the mortgage would be around $1,700 to $2,400 (making up numbers here), and rent it around $2,800 to $3,000 per month.

This type of financing requires the projected income of the property, determined by a local expert, to sufficiently cover the monthly mortgage debt.

So what been happening: I have made it to the point of conversation with a couple of sellers at this moment. 1 seller offered seller financing, I think that one is in the bag. 1 other is the reason why I am making this post. seller asking 190k.