It is really targeted at gross overuse. for sure. i just ensure it's in the contract to that I can exercise the RIGHT to charge it if I want to. 

Your mentor has needs; try to meet them and develop a mutually beneficial relationship.A mentor can benefit your growth, but it's not as simple as one post on a forum full of strangers.

Exercise caution and explore alternatives before considering them

I for one built a simple chrome extension to see if the mortgage is less than rent and accordingly provide that information on every zillow listing page.

It could be something as simple as a toilet running. 

You can secure the property with a promissory note drafted by a lawyer or a title company, but keep in mind that “taking back the property with the note” as it is often pitched by gurus is not always actually that simple.

I know I can go through a lawyer but I was told it is a fairly simple process hence want to DIY.Regards,Xuming

It can be a simple one page contract b/w you too at an agreed upon rate.

Do plenty of research and find out what other mistakes have been made in your are and learn from them.Both are great options but maybe doing a simple pros/cons list for both STR and LTR.

It is a simple value add.Get the permit and enjoy an easy value add (assuming it is close to $8k).good luck