You'll get high quality tenants who can pay their own rent and they pay on time.

You could also offer to pay for a home appraisal and agree to pay the property's fair market value.All the best!

Not paying fees and commissions when to unlicensed salespeople where none is disclosed.

Start by learning the real estate basics, study the market, set your goals, get a team of experts, make friends in the field, look into how to pay for it, begin small then grow, do deep checks, and go for it.

The original owner stopped paying the taxes and HOA.  

(I think proper due diligence would catch all the non paying tenants) as an LP I don't know how to check if that was done. 

Although the days of cash flowing a house hack are gone (for now), cutting your living expenses down and using OPP to pay most of your mortgage is pretty great!

Ability to pay, do they pay, have they saved?

To make matters worse, in order to maintain access to the private FB group after 90 days, you have to pay an additional $450+ per month (yes, you read that right).

I could just sell it and do a 1031 to avoid capital gainsBut it is not so simple to just "sell it" I have a solid tenant and they are paying $3.6k/month, haven't missed a single payment and they are so sweet.