I know one of the requirements for this visa is that the applicant must have an annual income of no less than £25,000. Must the applicant show that they have an INDEFINITE and on-going yearly income of £25k or more? Or is it sufficient to show access to £25k a year up until ILR is granted? ie, if the sale of a house gives the applicant a lump sum of, say, £300,000 at the time of application, but there is no yearly income?
Also, is ILR granted after 5 years on this visa? And does the visa holder and their spouse have use of the NHS while here on this visa? Inquiring daughters want to know!

Thanks!