If you really want a Leica lens but can't afford it, save your money for the Leica glass or consider buying used. Truthfully, if you want a Leica lens, then anything else you buy isn't going to cut it. And eventually, you'll buy the Leica lens and sell what you have at a loss. That means you will have paid considerably more for the Leica lens, as a result. In essence, buy what you really want, buy it once and save money in the long run.