Most people will go and do an instructor’s course but I would only recommend this if you believe you will enjoy instructing. You'd then be looking for a job instructing people for their PPLs at a local flying club
If you don't do instructors rating because you don't enjoy it and have no luck getting in with 250 hours, what do you do? Hire a PA28 for 450 hours for £100 per hour at a cost of £45,000? Whether you like it or not, I think the instructor route is the only way of getting the hours up without having to spend more than £6k. You might not like it, but I doubt you like the job you're doing now if you're attempting to become a professional pilot.
Lets face it, the only way to get on in this industry is to send out hundreds of CV's, offer to pay for any training/type rating you need for a job on type, network and finally be the best of the bunch - if that fails get an instructors rating and pray you'll get in that way!