Water heater 3 years old.

Not necessarily to become licensed, just to learn In an efficient and cost effective manner the basics that are necessary knowledge to be able to make informed decisions in the real estate field.   

Fewer than 20 have signed up.You can lead a horse to water...

I have 10 water front lots on a trout river in WNC with mountain views, they are cleared. i have the site permit, i have the well and septic permits.

Lot rent is $365 and includes water.

First you need to learn to separate the following:Maintenance: usually things related to wear & tear or tenant damage.Repairs: usually broken items like doors & windows, caused by tenant or nature.Capital Improvements: usually expensive things that wear out: hot water tanks, furnaces, roofs, etc.The seller is correct that Repairs & Capital Improvement items should not be a factor for awhile (ALWAYS get your own inspection to confirm).

The water may be backing up from another fixture that is not draining properly.

A fourplex means four times the appliances, plumbing, HVAC, water heater, and other repairs, driving up maintenance expenses compared to a single family.In Las Vegas, multi-family properties attract transient tenants, like singles or couples without children, who typically stay 1 to 2 years.

One way to get tax benefits while you're living there could be installing solar panels or upgrading the energy efficiency of the home. 

Quote from @Arun Maheshwari: Hi,Does the bank owned foreclosure property allows to put Inspection contingency for big issues like plumbing, eletricity etc.ThanksIf it is bank owned and the foreclosure has taken place - possibly but they would make you responsible to turn on power and water and turn it back off.