But heres what i did when i was married and funds were tight.
I put ads in the paper for non working pins - snap em up cheap, fix em up and sell them on. All proceeds go to the next purchase. But i was lucky and scored a JD cheap and so paid off the credit card debt with that one and after that - anything that was earnt from them was put straight back into the hobby - became a self funding hobby

This sounds like an interesting strategy, provided the restoration skills are good enough.