First, welcome to the board!
One tip that comes to mind is putting a kind of "pre-park" or "seed park" up front in the beginning when you need to raise money.
A "fun zone" of flat rides in a limited area so you don't need many sweepers to begin with.
Something like the one in this pic, of course without the building etc. and probably a lot more modest at first, just a simple, compact, efficient fun zone of a half-dozen or so rides.
Or, as I like to call it, a "cash register."
Financially speaking, it's a great way to beat the game instead of having the game beat you, this little fun zone will keep you in the black and will be the continuous seed capitol needed to get your more ambitious ventures aloft.
Thx