I put a time limit of about a month...
Its all about finding the right car and cheap, the TF I bought was a previous cat D, had no MOT and had been left in a garden for about 3 years! and the owner didn't know it was a VVC 160.
Cleaned it up checked engine was ok, then stripped all the valuable bits off, Seats & Door cards, CD, steering wheel, wheels, boot lid, engine wheels, roof, engine and loom, front and rear subframe, then scrap the rest, I don't bother with bits of trim as people want to pay fuck all for them and I cant be assed to send loads of stupid little bits.
Also I sell on owners clubs etc, not ebay because the fees are OTT nowadays! But I dont do loads so I'm not classed as a trader done 2 this year.