He went there to flush water heaters, and repair another water heater.

you can check into Praxis @Brian Burke@Ivan Barratt   has been through cycles those are two I know personally that I believe have the pedigree your looking for.lots of beginners in the space.. will be interesting to see how they flush out in these changing capital markets.

Also materials for each repair can very much vary depending on cause of that specific problem, for example a toilet not working could be a shut off valve, a bad flushing valve, a bad seal, etc...

On the experience you are light so you really need to be flush in the other two. 

Some landlords and property owners will call you assuming they can scam you into overpaying for their property...these may be motivated sellers later on, but at the moment, they're not worth dealing with and your screening process needs to be able to flush them out.Financials Asking PriceMortgage loan balanceAny 2nd mortgage on property?

I couldn't agree with Tom more...A lot of the people that try to get by on the cheap with a few books end up paying a lot more money in the long run because they end up in a bad deal and flush 2X what they would have paid for some decent education.

One of my favorites it to take on faucet connection off at the shut off valve and then turn on the opposite end to "flush" the faucet".

That's just another way to flush a heap of money away.

People are flush with cash or loans and available property is scarce. 

The PM or you (if self managed) will need inform tenants that they cannot flush certain products down the toilet and if the system fails it can cost a lot of money, but if properly maintained risk should be minimal.