The loan-to-value ratio (LTV Ratio) is a lending risk assessment ratio that financial institutions and others lenders examine before approving a mortgage. It sounds like your lender has a 60% requirement. Remember the home is the collateral for the loan. If you stop making payments, they can take the house back from you. That number is less than 100% to accommodate changing market prices, the cost of foreclosure, repairing and reselling the home. They may be a safety factor built in depending on the home's location.
If you want to buy a $1.8 million dollar home you will have to come up with 40% down payment. That down payment is what reduces the risk for the lender. So no, there is no way to cheat that. Think about the transaction from the view of the lender.
Note: in some areas, you can still get a loan if you don't have the required down payment. You just have to pay a monthly mortgage insurance. It's expensive but that works for many home buyers. A separate insurance company offers a policy that helps protect the lender when there isn't enough deposit paid.
Update: Er, no. Keep it simple. The bank will only loan you money if it has collateral for the loan. They've built in a hefty safety margin to protect them in case you quit paying them your monthly payments. If you want to spend the money on something else, that would work as long as you provide collateral to protect the lender. You mention borrowing money for some other purpose then buying a home. That would be fine, but you will have to come up with some collateral that protect the lender. If you wanted to buy a new business, the bank would first ask for an appraisal of the value of the assets of the business. That could be applied to the collateral safety net for the lender. If you wanted to buy a business that had little appraisal value, then the bank would require more collateral from you in other forms.
Say you wanted to borrow the money for an expensive operation or cosmetic surgery. In that case there is no collateral value in the operation. You can't sell anything from the surgery to anybody to recover costs. The money is spent and gone. Before the bank would loan you any money for such a surgery, they would require you to provide upfront collateral. (in this case if you were to borrow $60,000 for surgery, the bank would require $100,000 worth of collateral to protect their interest in the loan.) You borrow money, then you pay it back at a regular interval at an agreed upon rate and schedule.
Same thing for borrowing money for the stock market or a winning horse at the horse race. A lender will require a hard asset as collateral before making you a loan... Yes I know you have a good tip on a winning horse,and you are bound to double your money, but that's not the way it works from a lender's point of view.
It sounds like you are trying to game the system by playing on words. I will say quit using the "40% to 60%" phrase. That is just confusing. The bank's loan to value is reported as a single number (in this case 60%) For every $6000 you want to borrow, you have to provide an asset worth $10,000 as a safety guarantee for the loan.
If you want to borrow money for the purchase of a home, you will need to meet that 60% safety requirement. If you want to borrow $1,000,000 cash for something besides a home, then you will have to provide something with a retail value of $1,666,667 as equity.
I think the best way for you to answer your own question is for you to pretend to be the banker, then examine the proposal from the banker's viewpoint. Will the banker alway have enough collateral for whatever it is you are asking to borrow?
If you don't yet have that equity, and you need a loan for something besides a home, you can always save your money until you do have enough equity.
Comment One. I thought that most lenders had a 75% or 80% loan to value ratio. The 60% number seems pretty low. That could indicate you may be a high risk borrower, or possibly that lender is not the best for you. Have you tried other lenders? It's definitely worth shopping around for different lenders.
Comment Two. I will say, it almost sounds like you aren't being entirely honest with us here. No way someone with a monthly income who can afford a $1.8 Million home would be asking questions like this. I get that English probably isn't your first language, but still. The other thing is: If you are truly buying a $1.8 Million dollar home your real estate agent would be helping you find a lender that will work with you. They would be HIGHLY motivated to see this sale happen. All of your questions could be answered in ten minutes with a visit to your local bank (or any bank for that matter.) When you add up the costs and taxes and insurance on a 30 fixed loan, you'd have a monthly mortgage payment of nearly $10,500 a month or more. Can you really afford that on your monthly income?