Welcome to the site Oregon, I think £30,000 per year in your circumstances will be just fine, especially if you are living "up north" in N. Yorkshire or the like. End of 2017 our son bought a good size 3 bed semi up here for £145,000, and he lives well on £24,000 / year after tax, no mortgage, easy going lifestyle.
Depending on how your income is sourced and split up you may pay very little tax as you are taxed as individuals here. e.g. if you each have a pension of £15,000 then since the personal tax free allowance is £12,500 you will each have £2,500 taxed at 20%, so £500 each.