You are investing in tangible assets that will not disappear or lose their value like stocks could. 

It is a pain but not insurmountable. 

Unfortunately, I do own investment properties abroad that are still financed, so any lender that has experience with this would be much appreciated, the lack of experience in that regard has been a painful, and long underwriting process at first when I bought and then again when I refinanced my home a few years ago...

The pain is removing all HVAC, plumbing & electrical so you can sister or replace a beam or joist and then put them all back in.

You may need to make sure the debt is still being paid if you are able because your partner may just take all the cash and disappear.

Those landlords sometimes feels the pain managing property outside the state.  

@Neal Daftary-I think self-managing a duplex from 1.5 hours away is going to be a huge pain.

With fees and points and so on, their money cost me 16%, and it was a total pain to refinance to a 5% conventional mortgage.If you are going to do a deal which involves buying a house for $50k less than market price, then paying Eastside $10k to expedite the closing is totally worth it.Eastside funding are good people, and they provide excellent service. 

Which ones are the most painful?

*Listen for pain points.- Timeline.