Sounds like you're just gonna have to gamble and hope it downloads the whole thing. I found that babysitting the download sometimes works. Or deal with an emulator I guess, but that tends to have buggy controls because it's assuming you're using a phone and not a PC/Laptop.
My recommendation is to just check on it periodically and if it's stopped, hit resume. My current internet also bugs out and breaks the download and it occasionally works again if I hit resume. Sometimes it'll get corrupted and say the download is "forbidden", sometimes it won't and it'll actually start downloading again.