I installed an exhaust fan over their stove and I know that they use it, but it’s overmatched I’m afraid.

This is a long shot, but it sounds like she could be mentally unstable.

In a lot of locations we are getting away from the central systems, and, even detached homes that currently have through the wall exhaust, we have been changing to this type of product to eliminate the "fuzz" floating around the yard:https://adr-products.com/

This is a tough mental frame to  break for some.

She paid the rent on time and in full for several months until she almost exhausted her savings.

Some of the improvements include:Replacing the existing carpet with LVP (They had animals and there is a distinct odor)Replacing the acoustic drop ceilings (They painted the existing drop ceiling black)Removing a sliding glass door and replacing it with a french door for rental entranceReplacing the existing fluorescent lighting with can lightingReplacing painted wood panel with drywall, finishing, and painting said drywallMoving walls around to block off some areas and to make some areas biggerAdding a kitchen, which include cabinets, sink, range, and maybe a dishwasherCreate a path leading from my driveway around the backyard to the basement entrance.My space is about 1200 SF and I mentally prepared to spend about 15K to redo the basement to an acceptable quality level.

I had always been curious about real estate but was trapped in a scarcity mentality due to my upbringing and can now see how changing my state of mind opens up so many possibilities in my life.

After testing a dozen or more exhaustively, it came down to 2 that my OUR needs (your needs may be different).

Now that I am back in the area, I want to aggressively start acquiring properties, I have a good amount of capital, a positive outlook and a hard working mentality.

What would typically happen once the exemption is exhausted.