The best backup is another copy of what you already have so I'd say another Mini 5 Pro. All your accessories are interchangeable and if you crash one then that becomes a parts bin for the other. If you really want something different (or cheaper)...
I never stated that it was not about cheapness, only that cheapness was not cause. One can safely fly in ATTI mode even indoors without GPS. Safety required a well-trained pilot. Those flying the really low price drones are likely not well...
The government already knew about this (and so did we) and the government doesn't care about this. DJI (by way of all foreign-made UAVs) is already on the covered list and even if every citizen in the US is against that, DJI will remain on the...
Drones without GPS will make a difference. It's not the cheapness itself which is the issue. It's about features and capabilities drone and pilot, not about price.