What type of plumbing pipe is in the house - galvanized steel corrodes from the outside in, lead pipes may have been common back then.

It is very common for tenants to be nasty when the air conditioning goes out.

The mods are going to remove this for a forum advertising violation.

You probably have heard to join the local REIG as what you will find from the courses advertised everywhere anymore is that they offer general information that in many cases does not fit your market or state requirements. 

If not, then it's probably a common thing there.

I finally found another duplex a few towns over that had been sitting for a while, it was badly advertised.

Here's some guidance on buying your first investment property in Southern California or Columbus, Ohio:Down payment:For investment properties, lenders typically require 15-30% down payment on your first investment15% down is possible with excellent credit (700+ score)20-25% down is more common, especially for multi-unit propertiesSection 8 considerations:Pros:Guaranteed portion of rent from governmentPotential for longer-term tenantsMay be easier to fill vacancies in some areasCons:More paperwork and inspections requiredRent amounts set by local housing authorityPotential property damage concernsOther tips:Research local markets carefully - price trends, rental rates, etc.Factor in all costs - taxes, insurance, maintenance, vacanciesConsider starting with a single-family home or small multi-unitBuild a team - real estate agent, property manager, contractorsHave cash reserves beyond just the down paymentUnderstand landlord-tenant laws in your chosen locationI'd recommend talking to local real estate agents in both areas to get more specific market insights.

A common mistake I see for new STRs is making sure to fully understand what your property manager does.

Though accidents could happen, 99% of the time these issues that most people need to get policies for are due to the lack of common sense or for someone accepting responsibility for their actions. 

Or is it common knowledge?