If you can drive by the properties for sure it's a good thing, but it limits your range of bidding, for this reason, I prefer online auctions, I use photo services to have an updated view of the property if I'm really interested in. 

(Purchase price somewhere in the $600k range)The property should bring in around $45-$55k/yr running as an STR and there's already a manager at the building if you want to be completely hands off.Add me and send me a DM if you're interested in submitting an offer on something like this.

And I certainly didn't "cash flow", as rents were in the $18,000-20,000 range for the first few years.  

PM me pls Its hard to say - a broad range of things but essentially not disclosure issues and wanting things fixed that they didnt ask for after their first inspection.

.- These total 10 duplexes should bring in 30K gross rent per month and cash-flow about ~3-4K/month.We don't plan to use any of the cash-flow for personal expenses and after keeping sufficient reserves, we will funnel the cash-flow to pay-off existing properties.

To get long term financing you have to be somewhere in the 75k range on loan amount .

Insurance is great and absolutely required but it may not be sufficient if a renter or tenant comes after you.I have always suggested that investors go in highly leveraged.  

Some specific examples include careless installation of vinyl flooring in our kitchen, resulting in irreparable damage; leaving an exposed nail in remodeled kitchen cabinetry that scratched our new range; installation of bathroom sinks with improper plumbing connections; and multiple instances of failure to remove cigarette butts, food trash, and construction waste from our property.

The range for full service is 15-25%.Also as mentioned above you ought to be licensed and properly insured if you are to be a property manager. 

These tenants are so big that obviously you aren't going to get a personal guarantee out of them, but they're also such a safe bet that it's not seen as a big deal.In the smaller range of 3-5 year leases and small businesses, you don't see a lot of NNN, and you see more personal guarantees for the first term of the lease.