Buying your dreamed home now!
You are right. But why can't you borrow more money? Borrowing money is an art. If you can borrow 1 billion. You can really make a living by borrowing money then returning it. There are a lot to play with the APR of the loan and mortgage.
Take, I pray thee, my blessing that is brought to thee; because God hath dealt graciously with me, and because I have enough. And he urged him, and he took it.
The advantage of an online store of your own is freedom. Your store will look whatever you want it to be. You can list as many products as you like. The disadvantage is you have to spend time to design your site and get traffic. That means you have to be good at marketing.
For the online auctions, there is already built in traffic. All you need to do is list your product there and wait for customers. The disadvantage is that the cost is high. You have to pay the auction fee. To limit the auction fee, you may have to limit the number of items in your auction. And you have a limited freedom to customize how your auctions looks.