C/D class properties are excellent money makers based on having welfare tenants but it requires intensive hands on management not intimidated by the area. 

I know many, now unlicensed Investors who got more than just a slap on the wrist.As for the Broker, if you do choose to get your license, you should vet the broker and let them know your intensions. 

Seems like painting would be much less expensive than replacing - unless the painting is too labor intensive.

The materials cost isn't incredibly high but the work is labor-intensive.

Large cabins are more repairs & maintenance intensive:  They tend to host lots of people at one time - often well beyond the stated capacity, and things get torn up. 

A paved area for a basketball hoop?

ADUs are a great way to go; however, if they are your first one they are very capital intensive (garage conversation $85K+ not including what you would have to pay for purchasing the place etc.).

My son and I took a local class (8 days intensive) and we both had a great experience were we not only passed with flying colors but actually learned something.

@Matt K. the issue with doing it myself is all the up front intensive labor....find the market, vet the team (property manager, agents, title company, attorney, contractors).

I quit the basketball team and spent the year remodeling the house before I graduated.