What Place in Tanzania is Affordable and Comfortable Safe area?

I am planning on moving to Tanzania and I need guidance on what to expect when traveling to a distant land.  I am currently in Mexico now.  My girlfriend moved over there in 2021.  She lives in the City of Singida.  She is about 30 minutes from the Safari or the habitat of the animals but I prefer to be a least 2 hours from their territory. I also thinking of purchasing land or a home that is affordable where I have a garden to grow exotic plants and food.