I have two of the three you listed. Without question the Owon is the better of the three. The Owon HDS scopes are great little scope/DMM units, especially as you get into the higher models (I have the 200Mhz HDS2202S). I would buy the fastest one you can afford, but if 40Mhz is more than you'll ever need, then it will probably work well for you.
If that's the limits of your budget, the Owon is a good scope in that price range, but I would concur with others that you would be served better with a bench scope. And regardless you should pick up a separate DMM. In fact I'd still recommend two dedicated DMMs in addition to any type of scope device, even if said scope has a DMM built-in, but starting out on a budget having a combo device isn't a terrible idea.
You can get reasonable DMMs on a budget from Aneng/Zotek/Zoyi, Owon, and Kaiweets/Habotest. Although I'd suggest saving up to get at least one decent Bryman. The Chinese Flukes, like the 17B Max, are also good electronics meters without the US Fluke pricetag.