I understand the frustration but i know many who have bought type rating for business jets and then looked for a job.
What they do with their money is their business.
Sure its better to try and find a job first, then negotiate a rating, sure in a perfect world.
Owners ive flown with dont care, its just another saving for them, you just fly the machine. In fact i know a company who are managed like ryanair, how they manage to keep crews ill never know, but they keep crews coming to them, pilots willing to fly for free, yes free, for "experience"...
Bizjet's are no better than commercial aviation, so for work just keep trying all avenues.
Good luck
Uni