Brakes and Steering on a 1984 Itasca P30 and convertor

I want to thank everyone who responded to my last post. I am new to all this and recently purchased the above Rv. I find alot of play in the steering wheel and when using the brakes when I first stop it is pretty strong the second time it goes down a great deal and although it will stop it is pretty scary. Is there any place that sells parts for this year Itasca? We live in the Nashville area and I have called over 30 people who claim they work on RV's and no one would touch this because of the age. Any suggestions regarding the brakes and steering would be greatly appreciated. In addition the convertor that is in it will not reset the breaker...and when I plug in the RV chord and downsize it and plug in to a 30 amp it does not come on..the list goes on but these are the most important items. Thanks for your help everyone