^^^^ And you recorded the GP?
Really, the OP must be sadly lacking in
PR and negotiating skills
I'd have put it to PP-ess , that the home furnishing store is open until~ 10 PM, whereas the weather is somewhat unpredictable and seldom aligns with the window of opportunity.......
" If we go flying when it's light and suitable, dear, I'll be much more amenable to traipsing around an airless shed and may even be less grudging about parting with the amount of dosh you consider to be necessary"
Or, just TELL her you're going to indulge yourself first.