Integration of the state Kingdom of Kaprika on the blockchain cosmos

Friends! Please tell me which blockchain platform to choose for work? We created our own state Kingdom of Kaprika in 2007. We already have 37,000 citizens and another 200,000 are waiting for our passports. We want to create a blockchain passport and a blockchain state. Ethereum is not an option all very expensive on transactions. We want to create our own currency, voting, charity projects and the like within our state. In 2021 we are planning an expedition to discover digital America and a team of 12 people will be online 24/7 to discuss the implementation of blockchain in our state of Caprica! We will travel by RV buses around the USA in 100 days! It will be a startup accelerator on wheels!) Here is a link to the project.