Moving out of state, moving closer to work, school or moving into a bigger home due to expanding family like "pregnant" and/or requiring additional rooms or larger GLA.If you purchase a 2-4 unit and try to purchase another 2-4 unit if they are not "Common" to the area you will have a hard time.

You’d require a license for both of those.

My friend has a property but I think he is unsure about the STR regulations/requirement and that's why he is not considering STR arbitrage, but would be open to MTR. 

@Theresa Harris the ruling require exclusivity to the listing agent’s listings… one just becomes a client of the agent, who you happen to meet at one of their listings.  

They probably wouldn't recommend anyone do their own engineering or doctoring without being trained and licensed to do those things, but for some reason buying and selling a multi-million dollar home doesn't require training, education and practice...  

I also think you should be required to be licensed.

NV OR  and a few others require licenses to do this.

Something like that where you are paying a la cart fees that are applied at close under the buyer-broker agreement and commission agreement.Its going to be fun to figure out this year and next, I’m building basically a subscription based brokerage right now anyways where they sign up for the “plan” that suits them which will require the mandated buyer-broker agreement and commission schedule. 

Some may also require 12 month seasoning 

Not care, introduce legislation to bridge mortgage insurance requirements with lack of providers, get in the insurance market themselves?