here's some tips to help with money management.
-Use as little fencing as possible. Have exhibits share fences, or use natural barriers (sunken exhibits are great because then you can use only a little bit of fencing and also it can be really weak). Or you can use narrow cliffs between the exhibits.
-Use the cheapest version of everything. Loose food, chain link fencing, paths only one square wide. Don't use viewing canopies, binoculars, extra foliage, or anything that's not necessary.
-Make the exhibits small. That way you can fit more into a smaller space. Even if a space looks to small, give it a try. I put a moose exhibit in the area under the elevated path.
-Recycle everything you can. unnecessary fencing, all foliage outside exhibits, extra paths.
-Keep the guests happy. They'll give you more money.
-Place a gift cart.
-Make your sky tram tour as short as possible. Also make the distance between posts as far as you can make it.