Enticed to buy w/ promise of job

About 2 years ago, I bought a mobile home in a park after agreeing to become the on-site manager and moved from Florida to Washington. When I arrived, the job was no longer available, but I was obligated to buy the home.
Just 3 months ago, another couple bought a home in the park with the same promise of management. Again, the job was not available after they moved here.
The seller in both cases is the manager of the park.
Do we, both parties, have a case for fraud? Do we have legal recourse of any kind? Can we hold the owner of the park responsible for fraudulent activity by his manager?
The taxes on my place were 3 years in arrears, I paid them as well as the excise tax so I could get the title to the home. The taxes on the other couple's home are 1 year in arrears, should they pay those taxes or try to force the seller to do this?