We do make money on our pigs - just - but it has taken a lot of hard work and discipline. If we really wanted to make money, busking outside Asda probably would have been more profitable. But we love keeping pigs.
If I really, cynically, wanted to make money from pigs, I'd go round all the pig sales at markets and buy up all those cheap "cross breed" weaners and unsold fatteners, bring them on to slaughter weight, and sell that pork. But we love breeding rare breed pigs (OSBs, for the record), and want to do our bit to support rare breeds.
So we sell quite a lot of weaners to people like you, and people who just want to produce meat for their friends and family. The ones we raise ourselves, we get butchered to our spec and sell the meat to customers by advertising and marketing relentlessly and imaginatively. Selling the meat (at a fair price) takes far more effort than raising the pigs - and I find it far less interesting, though I have been surprised to discover what an entrepreneurial streak I have

. I plan to add a farm shop and snack shack selling bacon butties etc. - we're in a good location for that.
So the best of luck to you - enjoy your pig keeping. But the breed (or cross) is far less important than your business plan, if you're serious about trying to make a profit. Go for it!