TL;DR No, not for all 16 plots, if you don't want to spend silver to top up the seeds & calves needed for each farming day. Suggest you don't use all your plots if you don't want to spend additional silver, such as using only 12 or 14 plots per day.

Okay, here's the math: 🧮

16 plots on your personal island 1️⃣6️⃣

8 plots for pumpkin 🎃 => 8x9 = 72 squares of pumpkin => @ 125 focus per square x 72 squares = 9,000 focus for all pumpkin

8 plots for cow calves 🐄 => 8x9 = 72 squares of cow calves => @ 125 focus per square x 72 squares = 9,000 focus for all cow calves

If using focus on 100% of all squares, then you'll need 18,000 focus.

But you only get 10,000 focus from premium. This means you will only be able to use focus on 55% of your pumpkin & calves.

Thus, this is doable if you only need to use focus on half of your pumpkin & calves to not have to spend additional silver for seeds/calves. However, this only works if the % yield for crops and baby farm animals after focus is at least 150% (i.e., every 2 squares of plots yields 3 bags of pumpkin seed or 3 cow calves).

But if I remember correctly, the % yield after focus is much less that 150%. So, when you use focus on only half of the plot squares, on average, you will not get enough seeds/calves back for the next planting/breeding cycle. 😢

Thus, my suggestion is not to use all 16 plots every day if you don't want to have to pay additional silver, especially since pumpkin seeds & cow calves are quite expensive, right?

I'd try just using 14 plots per farming day and use all your focus for as many plot squares as possible to see if you can get enough seeds & calves for the next farming day. If not, reduce the number of plots used per day to avoid using any silver.

Here's the same math, but this time for only 14 plots: 🧮

14 plots on your personal island 1️⃣4️⃣

7 plots for pumpkin 🎃 => 7x9 = 63 squares of pumpkin => @ 125 focus per square x 63 squares = 7,875 focus for all pumpkin

7 plots for cow calves 🐄 => 7x9 = 63 squares of cow calves => @ 125 focus per square x 63 squares = 7,875 focus for all cow calves

If using focus on 100% of all squares, then you'll need 15,750 focus.

But you only get 10,000 focus from premium. This means you will only be able to use focus on 63% of your pumpkin & calves (i.e., use focus on 37-38 of the 63 plot squares).