Re: hello, i am zuki,
Ditto what Wabmester said.
Sales is a funny business. Those who basically take orders for what people were going to buy anyway usually work for paychecks that aren't very exciting. They often work in retail shops. Nothing wrong with that, but it is a different business altogether from the sales involved where the customer had no intention of buying, or was reluctant to do so. The salespeople in that situation either starve (if they aren't any good at it, or don't work at it) or really do well. Most sales of high ticket items (tens or hundreds of thousands of dollars) would fall into this category.
Buying land is like buying stocks. As Will Rogers is reported to have said, "buy stocks that go up. If they don't go up, don't buy them." If you know in advance that the value of the land is going to go up, and neither the seller nor any other potential buyer has this knowledge, then maybe you can do something quite profitale with land, but most of us are not in that situation. (I told Martha Stewart she should have stayed with the land deals...)
As far as I know, every credit card that allows cash advances also charges interest from the day of the advance, not from the end of the month, like they do with purchases.
A good starter book on where to put money is Andrew Tobias's "The only investment guide you'll ever need".
Dory36