Wow ok u have a big plan the question is what is your budget and how much cost one 4G Data Mobile Tariff or 4G Phone Tariff in your Country.
If u want 25K own Accounts u need 12,5K-25K SIM Cards better 25K to get the high trust score that u want. The best results we have if we create the account with a real unique phone (never was created a new account on this phone) and make a Warm Up on this phone manually. If u do all with a normal SIM Card and Real Phone u can make still for etc 3 Days a lot of actions and you also can follow 100 Accounts in 10 Minutes if your finger are fast enough. Than we try to get 100 Follow Manually and than we add the account to the Software. And than it starts u need unique content if u use content the already exist in tons on instagram the spider see it fast and your trust score falls and u lose your Account. Also what we notice is, if u dont post 30 Days and make a lot of actions your trust score are falling and u lose fast your Accounts. So try to post minimum 1 post all 30 Days that are unique and never postet before. Human faces has the best results for us.
And the next one u need a lot of locations. U cant make one proxy server on 1 location with 25K SIM Cards. I dont know how many people are living at your area but if u dont live in a city with millions of people, it can happen that all your proxy server get lost. And than u lose over night all your 25K Proxies and have to buy again all the Server/PC. U also will need strong Sever/PC to handle 25k Proxies and a lot of very strong PC to run all this accounts.
Try to open 25k Browsers on your PC go to instagram and look Storys your PC will die
Because if your PC runs to 100% CPU and 100% RAM the actions stocks and your account are losing trust level and its high rise to lose accounts.
So in the end u will need alone for the SIM Card 10$/month for Internet/SMS function like 250.000$ / Month. And than many Locations and all the Server/PC/Router/Modems/Phones. Make your own calculation. If u have the Money good luck with this big project
PS: Ahh and its real imprtant that this accounts looks real. If real people block or claim this account u lose it over night without warning. And no Chance to get it back.
Sorry for my bad English