Normally the conversion can be done in one month if everything is done correctly. If not you can get a letter allowing you to leave and return while the change is being processed.
Be sure to start the process before you get here so you can go the immigration office the next day after arrival.
https://www.gob.mx/tramites/ficha/cambio-de-residente-temporal-a-residente-permanente/INM823
https://www.inm.gob.mx/mpublic/publico/inm-tramites.html?a=thgeGuQHx2k%3D&tr=aMGJUsAf0Tk%3D&h_sdp00=giUnJ9XgtISVcdYJXduIGw%3D%3D&h_dsplp02=en
Yes it is dying. The satellite that Shaw service for this area of Mexico is coming from (Anik F2) is falling out of orbit and will eventually burn up as it falls back to earth. In preparation for this, Shaw has been moving channels over to a different satellite (Anik G1) which does not have a radiation pattern this far south so we will no longer get any Shaw service. It is time to find an alternative (Kiwisat or live streaming through the internet).
One reason you may not see many window A/C units here is because someone could easily pull the unit out from the exterior to gain entrance to your home. Not likely someone could do that with a mini split.
Water conservation works well when combined with fines and step rates. Austin, Texas began water conservation practices in the late 1990s. The results have been stunning, avg consumption per user in 2000 was 175 gallons/day. That dropped to 138 gallons/day in 2015 and in 2019 it dropped further to 120 gallons/day.
It is math + common sense.