What Skip and Martin say
I can understand feeling a bit low if unemployed, but don't give up the dream yet! (I was unemployed from a ' proper job' for 2 years when younger)
Only one night out? When I didn't camp so frequently as I do nowadays, I always slept badly and got achy back for the first night or 2 of a trip - my body/ mind just wasn't used to the change.
Give it another go?. You don't need to travel far to have good trips. Just find nice places (or gardens!). I yearn for northern rocky hills, but circumstances/ commitments don't allow too much travel away, though Im lucky to live in a beautiful part of the country with loads of options for camping/ bivvying nearby.
I made do with local countryside for quick overnighters. Just living outdoors however briefly can be a refreshing change.
If you are unemployed, then you have time to camp? Take advantage and get some experience.
Also, You dont have to backpack miles each day across mountains. maybe Just basecamp in some reasonable countryside nearby? ( not a site - expensive, and solo I imagine they can be depressing places unless just briefly stopping) Or maybe do a lowland trail.
Just buy food you can cook on a stove/ fire easily needn't be ' special food' that costs loads.
If you did sell your gear, how much would you get? how long would it last? Would you wonder
" what if?". If it was me in your shoes I' d maybe sell the expensive tent and buy a cheaper lighter solo model for using this summer.
See how it goes?