(Manhattan condo starts at 2M) I can guarantee 95% properties are running illegally. 

More syndicators go out of business and wind up in foreclosure and/or lawsuits to enforce loan guarantees. 

It has a 90-day guarantee... seems worth a try with that in place. 

Because I'll be overseas for a few years, would investing into "section 8" properties or making a rental a "section 8" property be a good idea because of the guaranteed rental income?

I can't guarantee I could make it but I'll try!

A good property manager can help with tenant screening, enforce lease terms, and handle evictions more efficiently if it comes to that.Require a Larger Security Deposit: Within the bounds of local regulations, a larger deposit can provide a cushion in case of damage or unpaid rent.Consider Rent Guarantee Insurance: Some companies offer insurance products that can cover lost rent in case of tenant default.

Variable income is SUPER hard since covid and no real way around that beyond showing an offer letter that states you get a minimum guaranteed hours, and you may need a payroll log to prove you never went below that number. 

This could give you the cash you need for the purchase and also eliminate your personal guarantee for the loans.

There is only 1 guarantee when you buy a property - you are about to spend a pile of money.

The things that get me are: Liberal politics in the city - this may be a benefit though, since they probably allocate a lot for affordable shelter and the Sec 8 is all but guaranteed.