I am an area real estate agent/broker that mainly works with VA buyers and helps moderate a Home Buying and Selling group on facebook (see link below). I think John's answer is spot on with one addition. If you have used the entitlement, paid off the loan, and still own the home (and want to purchase a second or vacation home) you can have your previously entitlement restored once; but, If you have used the entitlement, paid off the loan, and sold the home you can have your entitlement restored as many times as you want.
I do not believe the VA office will be able to help with rates and costs but they will with funding fee questions and your Certificate of Eligibility (COE). Rates and costs vary by mortgage company/bank and the VA will not quote these. And, while you can go through the process of gathering your COE on your own or through the VA portal, many mortgage contacts are able to do this for you as well. They will also be able to walk you through funding fee information. If you are a disabled veteran you are exempt from this fee. Make sure you are working with a team (lender, attorney, agent, etc.) who are proficient with VA loans. There are some ins and outs, and unique appraisal guidelines that not everyone may be aware of.
Best of luck!