Theoretically it is possible to find a market or condo complex where you can't cash flow, even with no debt, but that is probably rare.Generally, compared to other forms of residential real estate, condos are not a good investment.  

Is there a 'bankrate' type website for commercial loans I can compare rates? 

Also when comparing GRMs, remember that they are specific per property types, markets and even submarkets. 

I don't look the best on paper for traditional lending.  

I’d say 15-25 percent is a good amount to avoid overleverage  I don't get how you get more return with 20% down compared to more down with all of the interest payments you pay over the life of the mortgage.

It's far easier to get a mortgage as individuals compared to an LLC.

The quality of those letters doesn't compare to the ones you print yourself.

They've insured the title then the former owner file a lawsuit and got their property back.The courts in general feel that forfeiture of real estate is too harsh an outcome for not paying your taxes and sometimes the amount owed is tiny in compared to the value of the property. 

@Will Pritchett  You're having that problem with a traditional 30 year fixed?  

https://www.affordableopeners.com/doorbird-ip-vide...This system fits our criteria but we haven't been able to find any reviews on it so we are a bit skeptical and want to compare it to other options.