Learning how to setup tracking with a meh telescope and a sturdy mount is in my opinion more fun and more rewarding than just tracing with a DSLR tele lens. Unless you have a system with big enough magnification to start bumping into the real issues with stabilization and tracking, on a DSLR with an APS sensor that will start happening around 300/400 mm focal length and lenses that are good enough to start doing stacking with are more expensive than a meh telescope. Also it's better to start playing with a telescope sooner so that you get used to the particular problems of telescopes regarding IQ, like the ugly "bokeh" from the spider and the (lack of) chromatic aberration.