Andie, do you have a presence in the san Antonio market ?

I mean he will never have to worry about filling in a vacancy ever and I told him even if I don’t have the place Sublett at any given time he will get his rent like clockwork every month and what she does until this day. 5 other STR I have and I offered free snow removal in the winter time And (4)  free landscaping visits  composed of 2 in spring and 2 in summer which my brother (who owned a landscaping  company?)

Once you have a presence lots if your business should come from referrals. 

Quote from @Chris Mitton: Colorado law doesn't specify how much notice landlords should give before entering a rental—unless the entry is to inspect for or treat the presence of bed bugs.

Is the 4-plex composed of all 1-bed, 1-baths? 

There is a lot of work to build a presence but it could be worth it.https://ahrefs.com/blog/seo-ba...

I'm finally composing my "Bias Calculator" so I can translate from REI-ese to English.   

Again, everything can be done electronically and your presences in the US is unnecessary.It wouldn't hurt to check with an attorney.

They are not very good tenants, so I would prefer to end their lease sooner or later.Right now, I am composing a letter to send them demanding payment for the remaining balance.

Market there is probably pretty good since Toyota and other manufacturing companies have a large presence.