In the US, a home renovation can cost between $10-$60 per square foot, depending on the quality of the materials and the extent of the work, giving you a rough idea of what to expect. On that basis, you may feel the need to prioritize certain rooms above others.
As a guide, the average cost of a full kitchen remodel is around $30,000, bathrooms around $12,000, bedrooms $20,000, and basement conversions around £15,000.