More often than recommended is useful. The manual says 105K, earlier can’t hurt but a flush is NOT the same as a change! A “flush” just changes the fluid and leaves the grit in the filter behind. A “change” usually involves dropping the pan and replacing the filter. And not all the fluid since some will remain inside the transmission. I’m more comfortable changing the filter IF the car has one so the mechanic can get a look inside. If it doesn’t have a replaceable filter, just do a change - my 2 cents.
I have some issue with changing brake fluid every 60K miles. That maintenance should be 60K OR 3 years, whichever comes first. Brake fluid degrades by time far more than mileage.
Just 2 thoughts - 1) You say you are on a limited budget. Cars are very expensive but maintenance is cheap. If you don’t want to spend the money for a new one, I’d suggest spending money to keep this one running.
- The Suzuki is an orphan in the US. You will run out of the ability to get repair parts for this car, if you haven’t found this already. That fact may change how you look at the car. Maybe ignore any but the most needed maintenance and save every dime for this car’s replacement. Your call.