Because there are dozens upon dozens of configurations on the road, when stating a problem you really need to clearly identify what you equipment you have for people to try and help you.
Holiday Rambler only lists the Vacationer model for 2011 and used the Ford F53 chassis. The 36SBT model had a GVWR of 26,000. If that is incorrect, then please ignore the following and provide more details about what you do have.
That chassis above used a Hydromax Brake system. The service manual for that system is located here: http://alpinecoachassociation.com/ch...r%20Manual.pdf
Please review the Trouble shooting section at the end of that document and see if that answers your issue.
For reference, the Brake light is coming on because the differential pressure transducer is detecting a difference in pressure between the forward and rear systems. The Hydroboost light is indicating a loss in flow (via the flow switch) from the power steering pump supply side which is resulting in the electric emergency backup pressure pump to run (only used in emergency backup mode). The only other things that can cause all this is a defective Monitor Control module, loose connections, or low power steering fluid level (maybe loose PS belt?).