A less familar mechanic may charge more than one that has experience with hybrids so you may want to shop around for a mechanic. I still think that as a specialty it would cost more and you would want to estimate how that would balance with the savings.

You can research on-line what other hybrid owners had to say.

If you are purchasing an enviro-vehicle you may want to look for government subsidies being offered. Many people aren't aware but the dealerships that sell them can probably tell you what programs are available.

It could be $100s of dollars of savings.

This can sometimes be more than just on a federal level... could be a state done thing as well and if so you may be qualified for both. (I know in the past this has been done but I'm not sure which states and if still offered.)

You may have to initally cover the amount but they would mail you a substanial check later.