@Minky, glad you're back. Congrats to you on your new land! What a joy. I only have 4 acres.
A lot of your gardening choices will be determined by your soil structure. You really DON'T need raised beds IF you have good soil, and good drainage. For the longest time, raised beds were ALL THE RAGE. But, just b/c someone decided that's the way it should be done, that does not mean that's the way YOU should do it. You need to make your gardening decisions based on your soil, environment, micro climate, available space, and crop choices.
By far the most important thing is to choose an area that gets good sun (at least 6 hours/day) and does not have root encroachment from near by trees. Roots will spread almost as far as some trees can cast their summer shade! An other important consideration is access to water.
I will say that, for me, gardening under deep mulch has been my chosen method for at least 30 years. Recently, I found Back to Eden gardening, and am working towards converting my entire garden to BTE style. I may choose to do a raised bed here or there if growing root crops.
Suggested reading materials for you: Any thing Ruth Stout. Do you have cold winters? If so, Elliot Coleman. Paul G??? has some wonderful videos on the Back to Eden gardening method. Patricia Lanza covers Lasagna Gardening well.
Then, there is Hugel Kulture, square foot gardening, hay and straw bale gardening, sheet composting, vermicomposting.
As for raised bed gardening, you don't even need a wood frame to contain your raised bed. Simply pile the soil up, layer it in the lasagna style if that is your chosen method, and cover the sloped sides with cardboard, newspaper, flakes of hay.
No one style should comprise your entire gardening method, but you can pick and choose to make your land work for you.