This one worked pretty okay for my wife and I until we could purchase a traditional heavy bag. You can fill the base with water, but we used sand instead so that it really stayed put. I think Everlast makes a cheaper iteration of the same style bag, too.

Sorry to hear about your classes! Hope you get back to them eventually.

My dojang has these almost exclusively:
https://www.amazon.com/Century-101621-TKD-Wavemaster/dp/B000HZXVVS/ref=sr_1_15?ie=UTF8&qid=1546628577&sr=8-15&keywords=century+wavemaster

But I have the one you linked at home. I like it better; I also attach a clap target to it which you can't for the one I just linked.