Chris is right. You will get a bad reputation pretty quick if you aren’t able to close on the properties you make offers for.
You would basically have to use transactional funding and do a double close. You would get a POF letter from the transactional funding company and submit that letter along with your offer to the bank.
Do you have solid cash buyers already lined up for these properties? If so, the non-refundable deposit that they would give you could be used as your EMD to the bank.
If you and the bank come to an agreement, then they will give you 24 or 48 or however many hours to sign the final contract and get your EMD into escrow. So you would not have a lot of time to try and find a cash buyer in order to use their deposit as your EMD. You would really have to have all of your ducks lined up in a row in order to pull it off.
So otherwise, like Chris stated, you would have to find a partner or perhaps have someone loan you the money.