In Dino World, 4 parcels of land are given at first (14x14) and each expansion gives and additional 7x7 parcel of land. The amount of coins needed for each subsequent expansion increases exponentially, so a strategy of using coins for earlier expansions is preferable. But, as addressed in the Ice World section, it's probably best to continue using coins. Plus, if you get used to saving up for Ice World expansions, saving for Dino World ones will be even easier as the price never goes higher than 26 million. Consider this: if you pay entirely in acorns, you will spend 10,325 . If you pay entirely in coins, you'll spend about 275,801,490 .
The time it takes for coin-purchased expansions to complete also increases dramatically (less than an hour for the first few expansions and up to 4 days for the later expansions). So if you're using coins, it's a good idea to expand as soon and as much as possible -- as soon as one expansion completes, start the next one if you can. You can skip some or all of this time by using acorns; it seems to be about 10 acorns per hour, with a minimum of one acorn (meaning, whether you skip 1 second or 3 minutes, it will still cost you an acorn). So, if you normally use coins, and you're 1 hour away from the expansion completing, but you need to go to bed, you can use 9-15 acorns (depending on the exact number of minutes) to finish it early, and then start another one using coins.
Expansion Cost
Expansion
Coins
Wait Time
Acorns
1
100,000
30 Minutes
30
2
110,000
30 Minutes
35
3
121,000
1 Hour
40
4
133,100
2 Hours
45
5
146,410
2 Hours
50
6
161,051
3 Hours
55
7
177,156
3 Hours
60
8
194,871
4 Hours
65
9
214,359
4 Hours
70
10
235,794
5 Hours
75
11
259,374
6 Hours
80
12
285,311
7 Hours
85
13
313,842
8 Hours
90
14
345,227
9 Hours
95
15
379,749
10 Hours
100
16
417,724
11 Hours
105
17
459,497
12 Hours
110
18
505,447
13 Hours
115
19
555,991
14 Hours
120
20
611,590
15 Hours
125
21
672,749
16 Hours
130
22
740,024
18 Hours
135
23
814,027
19 Hours
140
24
895,430
21 Hours
145
25
984,973
22 Hours
150
26
1,083,471
1 Day
155
27
1,191,818
1 Day 1 Hours
160
28
1,310,999
1 Day 3 Hours
165
29
1,442,099
1 Day 4 Hours
170
30
1,586,309
1 Day 6 Hours
175
31
1,744,940
1 Day 8 Hours
180
32
1,919,434
1 Day 10 Hours
185
33
2,111,378
1 Day 12 Hours
190
34
2,322,515
2 Days
195
35
2,554,767
2 Days
200
36
2,810,244
2 Days
205
37
3,091,268
2 Days
210
38
3,400,395
2 Days
215
39
3,740,434
2 Days
220
40
4,114,478
2 Days 6 Hours
225
41
4,525,926
2 Days 6 Hours
230
42
4,978,518
2 Days 12 Hours
235
43
5,476,370
2 Days 12 Hours
240
44
6,024,007
2 Days 12 Hours
245
45
6,626,408
3 Days
250
46
7,289,048
3 Days
255
47
8,017,953
3 Days
260
48
8,819,749
3 Days
265
49
9,701,723
3 Days
270
50
10,671,896
3 Days 6 Hours
275
51
11,739,085
3 Days 6 Hours
280
52
12,912,994
3 Days 12 Hours
285
53
14,204,293
3 Days 12 Hours
290
54
15,624,723
4 Days
295
55
17,187,196
4 Days
300
56
18,905,914
4 Days
305
57
20,796,506
4 Days
310
58
22,876,156
4 Days 6 Hours
315
59
25,163,772
4 Days 6 Hours
320
60
27,680,148
4 Days 12 Hours
325
Game history note: The wait time for expansions to be completed used to be the key to a glitch for thousands of free acorns, however that has been fixed now.