there is nothing i cant do in my mind. Been working on computers and taking apart anything and everything and putting back together since the 80's as a kid, coding, building, repairing and replacing chips on pcb, etc.... and i already make enough money not to work, so if the information is out there, have all the time to figure it out...
If you know that you have what it takes and have all the time in the world, you could provide repair service and charge a premium, you will probably make a lot more money than actually mining, even if that doesn't make sense, it really makes no sense to buy a mining gear with such a high failure rate just because you can fix them, even if you think your time is free, wouldn't you rather watch some movies than having to fix a poorly built ASIC miner? besides, the time you are going to spend fixing them is time wasted not only for you but for the miner itself which would otherwise be generating revenue.
If i had 2 s17 overclocked i would make back my investment in about 2 months.
Assuming they will survive the overclocking for 2 months, which isn't something anyone would guarantee.
I can't think of any reason as to why would anyone (regardless of the circumstances in the world)buy any of those 17 series gears, if someone gives it to me for free, hell ya I'll take it, but will I pay half the price that gets me a Whatsminer or Avalon gear instead? hell, no.