Late payments can eventually turn into no payments, and they are a red flag that other things may go wrong.

You can expect you will be monitored by audio/video.If you're in a safe neighborhood but Tenants have security cameras everywhere, that's a red flag that something illegal may be going on.

Plus we invest in red states so we have good landlord laws on our side too.I started with turnkey remote rentals in 2009-2015 while working my engineering W2 job.

Too many red flags and what ifs to make it work.

My plan was to first present the owner with Loan C in red, and if it's not accepted we can either go with Loan B or Loan A, with Loan A being his initial offer. 

After we move out, we rent it out (long-term rental)I know a LOT more research needs to go into these to actually say whether they are viable or not (market and deal analysis), but I'm hoping for some guidance as to whether there are red flags or green lights in principle with any of these three scenarios (4a-c).Thanks in advance for any advice!

I'm with Nathan...... this is a HUGE red flag to me.

the first thing you need to do is raise a red flag and figure out why it is sold so cheap.

RE here seems to be at red hot nose bleed levels.

$15k from the sellers is a red flag in todays market.