I agree with others that allowing them to change terms teaches them they have the power to modify leases when they feel like it.If it costs money, they will rethink making modification requests.If vaping genuinely causes no damage to your property and they want to do it indoors bad enough, you get extra money just in case.  

-meter that works well and I know when a tenant is being genuine and when they're lying to me (the inherited tenants are typically the ones who try to B.S. me).

If you were a first-time investor it would seem genuine, but you said this is your seventh mortgage.You also haven't given any reasons for not refinancing or trying to value-add and then refinance.

Learn, research, analyze, find a source of money, get a mentor, find an agent or investor that knows the area and will genuinely look out for your interests-respect and reward them well. 

I genuinely appreciate everyone's help, and look forward to communicating with a lot of you in the near future.

Thanks Ryan for the genuine reply

Become part of the community and genuinely help others who are asking questions about property management in your market.   

I know I am in the right place when people genuinely want to help.

It's important to focus on being a problem solver for potential sellers, and to develop genuine relationships.

I'm not interested in investing myself but hoping to network with someone who is genuinely interested in pursuing perspective opportunities.