Do one thing say if a business is worth a 100,000 $ lend the money of the sum 100,000 $ and then when that business purchases goods worth of 100,000$ the worth property is of 200,000$ so now you issue a loan of 200,000 $ altogether.Let the copy of a drivers licence of the employee of the comapny that you purchase the goods along with the receipt justifying that you have purchased a goods of 100,000$ be the proof and incase that is not so the employee can be caught for fraud.Give further loans based on such receipt.Now evaluate the profit % of the business and tell the business that one got to summit the amount of transaction or sales that they have made excluding the profit % of the amount that they have sold to the bank on a weekely basis.Let the employee of the borrower varify such transaction of their sales on a daily basis that they sign and put their drivers licence number copy attached to it.Now they will summit the amount on a weekly if you want twice weekly basis so that the money is secured.If you want when there is 100,000 $ loan sanctioned on the property they possess they can purchase the goods of 100,000$ so that it becomes 200,000$ worth of property

and now you can lend loans of 200,000$ altogether and if they purchase the goods of 200,000$

you can now lend 400,000 $ to them.