Everything you need to know has already been explained by other members in one of your previous posts[1] But in short, no one is going to trust to send you collateral first when you're a newbie. Your terms don't make much sense.
OP is not looking for advice here, more like a backdoor way of promoting their service. "Hey I totally have a legitimate forum question that definitely belongs in meta even though I already know the answer".
Life is so much more then just low life scams and quick bucks in pocket it's a poor mindset and you dont reach far in life with criminal mindset.
Now back to the topic who i need to contact here to put money down and start business? And what ammount?
Do you want to dqsh people money or there is something you are not telling us? As you can see, starting a loan business does not need any stress of writing too much. What you need to do is to create your own thread in the service board with all the services you can provide starting the minimum loan amount, rate, interest, ranks that are eligible for your loan and for how long. These do not need you to seek for people's opinions at all. Anybody that is interested in your service will write you and if you are okay with the deal, you can proceed without stress.