What potential could Persia find in Central Asia? As far as I know, it's just a bunch of dry steppes with moderate coal and oil deposits.
Land (farm some cotton, farm whatever) and plenty of resources. Further lockdown of the world's fossil fuels reserves. Persia with 1801 borders in the west plus Central Asia (basically the entire "Persian cultural sphere") has utterly ridiculous amount of fossil fuels. Something like 1/3 of the entire world's proven natural gas reserves (as of now). Even more ridiculous if done by the early 20th century.
Since the fringes of the Arabian peninsula like Qatar, Bahrain, and as mentioned, Oman, have fallen under Persian control (and otherwise been influenced by Persia) in the past, that's even more oil and natural gas. And not just that, go check all the other stuff you can dig out of Central Asia.