Why would any seller offer to pay anything a buyer who turns out to be a flake?
I don’t know what your background is, but it sounds like you are getting ahead of yourself. Don’t be one of those crazy people who doesn’t have any money but goes into Ferrari dealerships and lead the sales staff on about how they are a real prospective buyer. All you end up doing is demeaning yourself on a deep physiological level by acting out what is actually a lie.
There is a level of investing that is appropriate to your situation. Start there and work your way up like most of us here did.
Any sellers who has been around the block will demand proof of funds when they receive an offer. They do that because for some strange reason real estate investing seems to attract the same crazy people who are acting out fantasy’s and do things like test driving Ferrari’s and then acting like they are very interested to know what it would take to get in their favorite color. Or, putting in offers on expensive income properties when they have no money, experience or backing.
I don’t know if that is your case, but from what you wrote it sounds like it.