I would be sure you need a new well first...
We have been here 10 years and the first time we had an issue, we needed a pump and a ballast tank.
This past year, we had extremely low pressure: basically a trickle. It turned out that the pipes coming off the pump were corroded. We replaced a bunch of them and our pressure is great. Cost for that repair was just over $500. I hope to never need a new well; it's 7-10k in southcentral PA.
We bought a model home 18 yrs ago. The builder had the well dug to the bare minimum and then put the ballast tank. We have never had good pressure but also can't run the water for more than 20 minutes. Forget watering lawn, adding water to the pool... now that the pump and ballast tank are going I'm just wondering if it would be better to redrill and gain better pressure and hopefully be rid of the tank.

We keep a large metal milk jug on our porch as decoration. When a storm's coming, we often fill it & then we have water for flushing and all you have to do is dump a gallon in the bowl and everything goes away. We do under those circumstances subscribe to the old "if it's yellow let it mellow, if it's brown flush it down" theory though