Electrical Advice for permanent hookup

I have just begun the process of restoring/remodeling a 1977 Sovereign to serve as my permanent guest house. I am looking for any advice on electrical considerations. For example, one old hand told me that I shouldn't leave the power on full time since it will ruin the power converter. Also, I may go ahead an replace the original converter since it has a lot of years on it. What recommendations would you have based on my planned use, no batteries, permanent connections, etc.? Basically if there is any wise advice I would appreciate it.



Thanks for all the help.



Tom