In studying Leviticus 25, God instructs on the Sabbatical years, along with the year a Jubilee.
" I will send you such a blessing in the sixth year that the land will yield enough for three years." Lev 25:21
God promises to give an abundance. But what if what God calls abundant is not what we call abundant? This passage describes what God means, you will still have leftovers when you get to harvest your crops three years later.
It's all on faith. Will it really last? What if mold or rodents invade the store houses? What if what God calls abundant isn't what I call abundant? Sadly, the Israelites never practice this concept (as far as we have recorded.)
Scripture states that God gives and takes away. His purpose is for us to rely on Him. A deep reliance that is above our physical needs. So a time of deficiencies of physical supply could be an abundance of Spiritual supply. A time to grow faith, trust and to experience the kindness of God's people.
One thing is clear - God gives us what we need - either blessing or discipline. As Jesus did many times in His ministry - He didn't always answer the question asked, but He went straight to the heart.
"What if" is worry - and Jesus directs in Matthew 6:34 "Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own."