I am searching for solutions

My aunt lives in an old brick apartment on the far side of a rural suburb in the southern midwest.  His apartment has seen better days although he diligently maintains it to the best of his abilities.  He put on a brand new roof all by himself last year plus just a week ago he finished painting the exterior walls.  His new project is digging out a koi pond he says he hopes to apartment with frogs plus varying color koi fish plus then build extensive plant structures surrounding the pound weaving in plus out of oddly sited rocks that wrap half of the whole structure plus form a sort of wall.  He says he wants to have a waterfall coming out of the top of that plant plus rock wall at some point when everything is finished. He usually had his Heating, Ventilation and A/C officially ran tests on but for some reason it slipped by his mind for more than 2 weeks while he was toiling away outside on various projects.  When he had to travel swiftly for a work conference, he left his humble abode confident that everything would be the same when he returned. Unfortunately, that wasn’t the case–his drip line on his air conditioning, which carries plus empties the water that is collected while I was in the cooling process, had slowly formed a clog plus it backed up in his house.  He had to have a mold remediation team come plus tear up his carpet plus treat his flooring with chemicals. Thankfully the mold growth was minimal since he had only been away for a week. He made the necessary repairs plus installed ultra violet lights in his air handler to help purify any potential spores still in the air. He absolutely l acquired his lesson when it comes to keeping up on Heating, Ventilation and A/C service.