The occupants she is seeking to add are two females (one adult and one teen).

Just because they live in your rental doesn't mean you are responsible for mediating every time two adults have a disagreement.

At the end of the day, it was head shaking that an adult would t be able to figure out how a shower drain works. 

Adults learn best in person, and you can supplement with online, but that should not be primary.#2...Ask to see the training calendar...same thing...no calendar...then you have to question if it will happen and when.#3...Ask how much it costs...especially when you are new and perhaps don't have significant real estate revenue stream.#4...Ask their expectations of you?

(Sinkholes/limestone)2-I have lived in two homes as an adult.

Let her change  the light bulbs and be an adult as well.

These units have been vacant now for 2 months and I'm out of ideas on how to market the units to people who will move forward.All four units are 1 bed/1 bath units and I have the following criteria:Fees:$300 security deposit, $50 application fee per adult (18Y+).Criteria as follows:no evictions in the last three (3) years; felonies on a case by case; no sexual offenses; income 2.5 times the rent.Any thoughts or tips would be very helpful!

The 'hoarders' specifically were allotted 3 cats and two adults, and simply are now breaking the agreement.  

An individual, two or more persons related by blood or marriage, a group of two or more disabled residents protected under the Federal Fair Housing Amendment Act of 1988, adult family homes as defined under Washington State law, or a group living arrangement where six or fewer residents receive supportive services such as counseling, foster care, or medical supervision at the dwelling unit by resident or non-resident staff.

We are also currently working on writing our first lease agreement, our question is if we include all of the tenant's children/relatives etc... age 18 and older that will be living in the home on the lease and if the mother or father leaves, moves out, etc... will all of the remaining adults on the lease be fully and legally responsible to fulfill the remaining months on the lease?