In order to apply for ILR as a Spouse on the 5 year or 10 year, you will need to ensure that your marriage continues to be subsisting and is genuine. You now have children and this will also help to demonstrate evidence of your relationship. You will also need to satisfy the English test requirements and meet the £18,600 eligibility requirements. The cost of applying for a ILR Spouse visa application currently costs £1,846 as of October 2023. Given that this is your last application, it is important to ensure that all your details and documents are checked and to seek legal advice, document checking service or instructing a good law firm.

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Original Source: https://www.quora.com/What-is-the-process-for-obtaining-indefinite-leave-to-remain-in-the-UK-after-living-in-the-country-on-a-marriage-partner-visa-for-ten-years-Is-it-expensive-and-complicated/answer/My-Legal-Services-1